Of four numbers whose average is 60, the first is 1/4th of the sum of the last three. The first number is

Of four numbers whose average is 60, the first is 1/4th of the sum of

1.	Of four numbers whose average is 60, the first is 1/4th of the sum of the last three. The first number is
A.	45
B.	15
C.	55
D.	48
Answer» E.