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

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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

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Best answer

Correct Option :- (A) 608

Explanation :-

We have  a * b =2ab  ; a, b ∈ Z

∴ 19 * 16 = 2(19) (16) = 608.

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