Quant Exam > Quant Questions > The average age of 40 students of a class is ...
Start Learning for Free
The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :
- a)15.2 years
- b)16 years
- c)16.2 years
- d)16.4 years
- e)None of these
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 40 students of a class is 15 years. When 10 new stu...
Most Upvoted Answer
The average age of 40 students of a class is 15 years. When 10 new stu...
Given data:
- Average age of 40 students in a class = 15 years
- 10 new students are admitted
- Average age increases by 0.2 years
To find: Average age of new students
Solution:
Let the sum of ages of 40 students be S1 and the sum of ages of 10 new students be S2.
We know that average age is given by (sum of ages)/(number of people).
So, we can write two equations using the given data:
Equation 1: S1/40 = 15 (since average age of 40 students is 15 years)
S1 = 600 (multiplying both sides by 40)
Equation 2: (S1+S2)/50 = 15.2 (since average age increases by 0.2 years when 10 new students are added)
S1+S2 = 760 (multiplying both sides by 50)
Substituting Equation 1 in Equation 2:
600+S2 = 760
S2 = 160
So, the sum of ages of 10 new students is 160 years.
To find the average age of new students, we divide the sum by the number of new students:
Average age of new students = S2/10 = 16 years
Therefore, the average age of new students is 16 years (option B is correct).
- Average age of 40 students in a class = 15 years
- 10 new students are admitted
- Average age increases by 0.2 years
To find: Average age of new students
Solution:
Let the sum of ages of 40 students be S1 and the sum of ages of 10 new students be S2.
We know that average age is given by (sum of ages)/(number of people).
So, we can write two equations using the given data:
Equation 1: S1/40 = 15 (since average age of 40 students is 15 years)
S1 = 600 (multiplying both sides by 40)
Equation 2: (S1+S2)/50 = 15.2 (since average age increases by 0.2 years when 10 new students are added)
S1+S2 = 760 (multiplying both sides by 50)
Substituting Equation 1 in Equation 2:
600+S2 = 760
S2 = 160
So, the sum of ages of 10 new students is 160 years.
To find the average age of new students, we divide the sum by the number of new students:
Average age of new students = S2/10 = 16 years
Therefore, the average age of new students is 16 years (option B is correct).
|
Explore Courses for Quant exam
|
|
Similar Quant Doubts
The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer?
Question Description
The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer? for Quant 2024 is part of Quant preparation. The Question and answers have been prepared according to the Quant exam syllabus. Information about The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Quant 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer?.
The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer? for Quant 2024 is part of Quant preparation. The Question and answers have been prepared according to the Quant exam syllabus. Information about The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Quant 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer?.
Solutions for The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Quant.
Download more important topics, notes, lectures and mock test series for Quant Exam by signing up for free.
Here you can find the meaning of The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect 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 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 years. The average age of the new students is :a)15.2 yearsb)16 yearsc)16.2 yearsd)16.4 yearse)None of theseCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Quant tests.
|
|
Explore Courses for Quant 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