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Reason:

P (5 on 1st die) = 1/6

Total = 6 sides. There is one 5.

P (even number on 2nd die) = 3/6 = 1/2

Total = 6 sides. There are even numbers on 3 sides.

P (5, even number) = 1/6 x 1/2 = 1/12

Multiply the probabilities.