average of 21 number is 36 if the average of first 12 numbers is 15 th | Examsbook

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776 0

Q:
Average of 21 number is 36. If the average of first 12 numbers is 15, then find the average of remaining 9 number?

1
64
2
78
3
24
4
36

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Answer : 1. "64"

Maths Average Questions

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