There are four numbers. Average of the first three is 15 and of last three is 16. If the last number is 19, find the first number.

There are four numbers. Average of the first three is 15 and of last t

1.	There are four numbers. Average of the first three is 15 and of last three is 16. If the last number is 19, find the first number.
A.	16
B.	20
C.	19
D.	None of these
Answer» B. 20

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There are four numbers. Average of the first three is 15 and of last three is 16. If the last number is 19, find the first number.

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