Question

The mean of 40 items is 35. Later on. it was discovered that two items were misread as 36
and 29 instead of 63 and 22. Find the correct mean.
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Answer 1

Answer:

sum of 40 items misread =35×40=1400

increase/decrease due to misreading=(63-36)+(22-29)=20

so total sum of correct items =1400+20=1420

so mean of 40 items=1420÷40=35•5

Answer 2

Step-by-step explanation:

the mean of 40 item is 35 later on it was discovered that the two items for mrs 39 and 29 instead of 63 and 22 find correct mean