the mean of 40 items is 17. if the mean of 10 items among them is 20, find out the mean of the rest .
Answers
Answered by
4
Answer:
Mean of 10 items=17
∴ Total of 10 items=17×10=170
if each number is increased by 5 then total increment=10×5
Then total of 10 number=170+50=220
∴mean=
10
220
=22
Similar questions