Question

Let be a binary operation on Z .If a b = 2ab where a, b ∈ Z then the value of 19 * 16 is

(A) 608

(B) 70

(C) 68

(D) 304

Answer 1

Correct Option :- (A) 608

Explanation :-

We have a * b =2ab ; a, b ∈ Z

∴ 19 * 16 = 2(19) (16) = 608.