The average of a,b,c is 20 and that of b,c,d is 25, if d=30, then the value of a is-

The average of a,b,c is 20 and that of b,c,d is 25, if d=30, then the

1.	The average of a,b,c is 20 and that of b,c,d is 25, if d=30, then the value of a is-
A.	25
B.	45
C.	30
D.	15
Answer» E.

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The average of a,b,c is 20 and that of b,c,d is 25, if d=30, then the value of a is-

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