Question

2.
Mean of 10 items was found to be 15. On verification, it was found that an item 21
was miscopied as 12. The correct mean is
a) 14.1
b) 15.9
c) 24
d) none
The mean mark scored by 100​

Answer 1

Solution:

Solution:Observed sum of the items

Solution:Observed sum of the itemsCorrected sum of the items

Solution:Observed sum of the itemsCorrected sum of the items Corrected mean

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Answer 2

Answer:

itz option d)

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