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

Average of 21 number is 36. If the average of first 12 numbers is 15,

1.	Average of 21 number is 36. If the average of first 12 numbers is 15, then find the average of remaining 9 number?
A.	64
B.	78
C.	24
D.	36
Answer» B. 78

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

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