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Question

Two dice are thrown simultaneously. What is the probability of getting two numbers who product is even?

A
14
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B
34
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C
512
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D
712
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Solution

The correct option is B 34
Product of two numbers is even if either one or both of them are even.
Thus, an odd number can multiply with 3 even numbers to become even, & an even number can multiply with all numbers.
pairs are;
(1,2) (2,1) (3,2) ................. (6,1)
(1,4) (2,2) (3,4) . .
(1,6) . . .
. . .
. . .
(2,6) (3,6) (6,6)
______3 pair______ ______6 pair______ ______3 pair______ ______6 pair______
which total to 27 pairs which can form even numbers
P[Product=even]=2762=2736=34

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