Defence Exam > Defence Questions > The mean of five numbers is 30. If one number...
Start Learning for Free
The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is
- a)28
- b)30
- c)35
- d)38
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
The mean of five numbers is 30. If one number is excluded, their mean ...
Mean of 5 numbers = 30
Total sum of 5 numbers = 30 x 5 = 150
After excluded one number
Mean of 4 numbers will be = 28
Total sum of 4 numbers = 4x28=112
Thus, excluded number
= (sum of 5 numbers - sum of 4 numbers)
= 150-112 = 38
Option (d) is correct.
Total sum of 5 numbers = 30 x 5 = 150
After excluded one number
Mean of 4 numbers will be = 28
Total sum of 4 numbers = 4x28=112
Thus, excluded number
= (sum of 5 numbers - sum of 4 numbers)
= 150-112 = 38
Option (d) is correct.
Most Upvoted Answer
The mean of five numbers is 30. If one number is excluded, their mean ...
Mean of 5 numbers is 30
Let's assume the five numbers are a, b, c, d, and e.
So, their mean is given by:
(a + b + c + d + e) / 5 = 30
Mean of 4 numbers is 28
If we exclude one number, let's say 'e', the mean of the remaining four numbers will be 28.
So, the sum of the remaining four numbers is given by:
(a + b + c + d) = 28 * 4 = 112
Calculating the excluded number
To calculate the excluded number, we need to find the difference between the sum of the five numbers and the sum of the remaining four numbers.
The excluded number can be found using the equation:
Excluded number = Sum of five numbers - Sum of four numbers
Excluded number = (a + b + c + d + e) - (a + b + c + d)
Excluded number = e
Substituting the given mean values
Now, we substitute the mean values given in the question.
(a + b + c + d + e) / 5 = 30
(a + b + c + d) + e = 30 * 5
112 + e = 150
e = 150 - 112
e = 38
Therefore, the excluded number is 38, which corresponds to option D.
Let's assume the five numbers are a, b, c, d, and e.
So, their mean is given by:
(a + b + c + d + e) / 5 = 30
Mean of 4 numbers is 28
If we exclude one number, let's say 'e', the mean of the remaining four numbers will be 28.
So, the sum of the remaining four numbers is given by:
(a + b + c + d) = 28 * 4 = 112
Calculating the excluded number
To calculate the excluded number, we need to find the difference between the sum of the five numbers and the sum of the remaining four numbers.
The excluded number can be found using the equation:
Excluded number = Sum of five numbers - Sum of four numbers
Excluded number = (a + b + c + d + e) - (a + b + c + d)
Excluded number = e
Substituting the given mean values
Now, we substitute the mean values given in the question.
(a + b + c + d + e) / 5 = 30
(a + b + c + d) + e = 30 * 5
112 + e = 150
e = 150 - 112
e = 38
Therefore, the excluded number is 38, which corresponds to option D.
|
Explore Courses for Defence exam
|
|
Similar Defence Doubts
The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer?
Question Description
The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer?.
The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer?.
Solutions for The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Defence.
Download more important topics, notes, lectures and mock test series for Defence Exam by signing up for free.
Here you can find the meaning of The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer?, a detailed solution for The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number isa)28b)30c)35d)38Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Defence tests.
|
|
Explore Courses for Defence exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup