Q3. 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?
(a) 50 (b) 50.7 (c) 52 (d) 52.7
Answers
Answered by
9
Answer:
50.7
Step-by-step explanation:
The mean of 100 items was 46
=> total = 46 * 100 = 4600
16 was misread as 61
=> Total = 4600 - 61 + 16 = 4555
43 was misread as 34
=> Total = 4555 - 34 + 43 = 4564
number of items were 90
=> Mean = 4564/90
= 50.71
= 50.7 ( upto 1 Decimal Place)
option b is correct
Similar questions