Out of four numbers the average of the first three is 16 and that of the last three is 15. If the last number is 20, than first number is :

Out of four numbers the average of the first three is 16 and that of t

1.	Out of four numbers the average of the first three is 16 and that of the last three is 15. If the last number is 20, than first number is :
A.	5
B.	1
C.	3
D.	8
Answer» D. 8

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Out of four numbers the average of the first three is 16 and that of the last three is 15. If the last number is 20, than first number is :

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