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The total of the present ages of A,B,C a...

The total of the present ages of A,B,C and D is 96 years. What is B's present age ?
(i) The average age of A, B and D is 20 years.
(ii) The average age of C and D is 25 years.

A

(I) alone is sufficient.

B

(II) alone is sufficient.

C

Both (I) and (II) together are sufficient but not alone.

D

(I) and (II) together are also insufficient.

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