MyQuestionIcon

2

You visited us 2 times! Enjoying our articles? Unlock Full Access!

Sum of n Terms

Mean of 100 v...

Question

Mean of 100 values was calculated as 155. On checking it was discovered that 42 and 26 were wrongly copied as 22 and 16. The correct means is

A

155.3

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

B

154.7

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

C

157.5

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

D

None of the above

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

Open in App

Solution

The correct option is A 155.3
Correct mean= $= 155 + [(42 + 26) - (22 + 16)] / 100$
$= 155.3$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Mean of 70 values was calculated as 400, On rechecking it was discovered that 250 was wrongly copied as 355 .The correct mean is

20

observations is

15 .

On checking it was found that the two observations were wrongly copied as

3

6 .

The correct values are

8

4

, then correct mean will be given by:

20

observations was found to be

16.5

. It was later discovered that one observation was wrongly copied as

12

21

. Find the correct mean

Q. The mean of 100 observation was found to be 40. Later on, it was discovered that tow items were wrongly taken as 30 and 27 instead of 3 and 72. Find correct mean.

Q. The average height of 30 boys was calculated to be 150 cm. It was detected later that one value of 165 cm was wrongly copied as 135 cm for the computation of the mean. Find the correct mean.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Arithmetic Progression - Sum of n Terms

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Standard XII Mathematics

Join BYJU'S Learning Program

CrossIcon