The average of first three numbers is double of the fourth number. If the average of all the four numbers is 12, find the 4th number.

The average of first three numbers is double of the fourth number. If

1.	The average of first three numbers is double of the fourth number. If the average of all the four numbers is 12, find the 4th number.
A.	16
B.	48/7
C.	20
D.	18/7
Answer» C. 20

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The average of first three numbers is double of the fourth number. If the average of all the four numbers is 12, find the 4th number.

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