Out of four numbers, the average of first three is 15 and that of last three is 16. If the last number is 19, find the first number.

Out of four numbers, the average of first three is 15 and that of last

1.	Out of four numbers, the average of first three is 15 and that of last three is 16. If the last number is 19, find the first number.
A.	14
B.	15
C.	16
D.	18
Answer» D. 18

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Out of four numbers, the average of first three is 15 and that of last three is 16. If the last number is 19, find the first number.

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