The mean of 100 items was 46. Later on it was discovered that an item 16 was mis

Question

The mean of 100 items was 46. Later on it was discovered that an item 16 was misread as 61 and another item 43 was misread as 34. It was also found that the number of items were 90 and not 100. Then what is the correct mean ?

Options:

A . 50.7

B . 50

C . 52.7

D . 52

Answer: Option A
Answer: (a)Required Average = ${100 × 46 – 61 – 34 + 16 + 43}/90$= ${4600 – 36}/90$ = $4564/90$ = 50.7

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