Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > The average age of a group of six children is...
Start Learning for Free
The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.
- a)15 years
- b)16 years
- c)17 years
- d)18 years
- e)12 years
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
The average age of a group of six children is 15 years. From the group...
Sum of the ages of 6 children = 15 × 6 = 90
When two children left, sum of the ages of 4 children = 90 − (18 + 20) = 52
Sum of the ages of new children = (15 + 4) × 4 = 76
∴ Required average = 76 + 52 /8 = 128 /8 = 16 years
When two children left, sum of the ages of 4 children = 90 − (18 + 20) = 52
Sum of the ages of new children = (15 + 4) × 4 = 76
∴ Required average = 76 + 52 /8 = 128 /8 = 16 years
Most Upvoted Answer
The average age of a group of six children is 15 years. From the group...
Let's break down the problem step by step to find the new average age after the changes.
Given:
- The average age of a group of six children is 15 years.
Step 1: Calculate the sum of the ages of the six children.
Since the average age is given as 15 years, we can multiply the average by the number of children to find the sum of their ages.
Sum of ages = Average age * Number of children
Sum of ages = 15 * 6
Sum of ages = 90
Step 2: Subtract the ages of the two children who left.
The ages of the two children who left are given as 3 years more and 5 years more than the average age.
So, the ages of the two children are 15 + 3 = 18 years and 15 + 5 = 20 years.
Subtracting these ages from the sum of ages calculated in Step 1:
New sum of ages = Sum of ages - (Age of child 1 + Age of child 2)
New sum of ages = 90 - (18 + 20)
New sum of ages = 90 - 38
New sum of ages = 52
Step 3: Add the ages of the four new children.
The average age of the four new children is given as 4 years more than the given average age of 15 years.
So, the average age of the four new children is 15 + 4 = 19 years.
To find the sum of their ages, we can multiply the average age by the number of children.
Sum of ages of new children = Average age of new children * Number of new children
Sum of ages of new children = 19 * 4
Sum of ages of new children = 76
Step 4: Calculate the new total sum of ages.
New total sum of ages = New sum of ages + Sum of ages of new children
New total sum of ages = 52 + 76
New total sum of ages = 128
Step 5: Calculate the new average age.
New average age = New total sum of ages / Total number of children
New average age = 128 / (6 - 2 + 4)
New average age = 128 / 8
New average age = 16
Therefore, the new average age of the group after the changes is 16 years (option B).
Given:
- The average age of a group of six children is 15 years.
Step 1: Calculate the sum of the ages of the six children.
Since the average age is given as 15 years, we can multiply the average by the number of children to find the sum of their ages.
Sum of ages = Average age * Number of children
Sum of ages = 15 * 6
Sum of ages = 90
Step 2: Subtract the ages of the two children who left.
The ages of the two children who left are given as 3 years more and 5 years more than the average age.
So, the ages of the two children are 15 + 3 = 18 years and 15 + 5 = 20 years.
Subtracting these ages from the sum of ages calculated in Step 1:
New sum of ages = Sum of ages - (Age of child 1 + Age of child 2)
New sum of ages = 90 - (18 + 20)
New sum of ages = 90 - 38
New sum of ages = 52
Step 3: Add the ages of the four new children.
The average age of the four new children is given as 4 years more than the given average age of 15 years.
So, the average age of the four new children is 15 + 4 = 19 years.
To find the sum of their ages, we can multiply the average age by the number of children.
Sum of ages of new children = Average age of new children * Number of new children
Sum of ages of new children = 19 * 4
Sum of ages of new children = 76
Step 4: Calculate the new total sum of ages.
New total sum of ages = New sum of ages + Sum of ages of new children
New total sum of ages = 52 + 76
New total sum of ages = 128
Step 5: Calculate the new average age.
New average age = New total sum of ages / Total number of children
New average age = 128 / (6 - 2 + 4)
New average age = 128 / 8
New average age = 16
Therefore, the new average age of the group after the changes is 16 years (option B).
Attention Computer Science Engineering (CSE) Students!
To make sure you are not studying endlessly, EduRev has designed Computer Science Engineering (CSE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Computer Science Engineering (CSE).
|
Explore Courses for Computer Science Engineering (CSE) exam
|
|
Similar Computer Science Engineering (CSE) Doubts
Top Courses for Computer Science Engineering (CSE)View all
The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer?
Question Description
The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer?.
The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer?.
Solutions for The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE).
Download more important topics, notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free.
Here you can find the meaning of The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.a)15 yearsb)16 yearsc)17 yearsd)18 yearse)12 yearsCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Computer Science Engineering (CSE) tests.
|
|
Explore Courses for Computer Science Engineering (CSE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup