MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Introduction to Statistics

The mean of 5...

Question

The mean of 5 numbers is 27. If a new number is included, the new mean becomes 25. Find the included number.

A

12

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

13

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

15

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

11

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C 15
Mean of 5 observations $= 27$

Sum of 5 observations $= 27 \times 5 = 135$

On including an observation, the new sum of 6 observations $= 25 \times 6 = 150$

Included observation $=$ Sum of 6 observations – Sum of 5 observations $= 150 - 135 = 15$

Suggest Corrections

thumbs-up

42

Similar questions

Q. The mean of 5 numbers is 27. If one more number is included, then the mean is 25. Find the included number.

Q. The mean of 9 numbers is x. If one number is included which is 3x, then the new mean is

Q. Seven of the eight numbers in a distribution are

11, 16, 6, 10, 13, 11, 13.

Given that the mean of the distribution is

12

,if 12 will be included then find the new mean of the distribution.

Q. The mean of 7 numbers is 20. If three numbers are included but there is no change in the mean, then the mean of included numbers is

6

42

. If one number is excluded, the mean of remaining numbers is

45

. Find the included number.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Introduction to Statistics

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Introduction to Statistics

Standard VII Mathematics

Join BYJU'S Learning Program

CrossIcon