Question

Mean of 200 items was 50 .later on it was discovered that the two items were misread as 92 and 8 instead of 192 and 88. Find the correct mean

Answer 1

Answer:

50.9

Step-by-step explanation:

Given:

Mean of 200 items = 50

(X+92+8)/200 = 50

X+100 = 10000

X = 10000 - 100

X= 9900.

If 9900 is added to 192 and 88, then new mean is written as,

(9900+192+88)/200

= 10180/200

= 50.9 (Approx. 51)

Answer 2

Answer:

Step-by-step explanation:

Mean=50

Total sum of the values =200×50=1000

To get the correct sum subtract the mosread nos. And add the correct values

=1000-92-8=900

=>900+192+88

=1180

The correct mean =1180÷200=5.9