Question : Three integers are chosen at random from the set of first 20 natural numbers. The chance that their product is a multiple of 3 is

(A) 194/285

(B) 1/57

(C) 13/19

(D) 3/4

Answer : option (A)

Solution :

with
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Question : Three integers are chosen at random from the set of first 20 natural numbers. The chance that their product is a multiple of 3 is

(A) 194/285

(B) 1/57

(C) 13/19

(D) 3/4

Answer : option (A)

Solution :