Question

8. Mean of 5 numbers was calculated as 21.8. Later it was found that number 21 was read
as 12. Find the correct mean.​

Answer 1

Mean of 5 nos. = 21.8

Sum of 5 nos. = 21.8 x 5= 109

Error = -9

.°. Actual sum= 109-9=100

Actual Mean=100/5 = 20

Answer 2

Step-by-step explanation:

Mean of 5 nos.=21.8

Sum of 5 nos=21.8×5=109

Error =-9

Actual sum=109-9=100

Actual mean=100/5=20