Asked by Lily
Two different numbers are chosen at random from the set {1, 2, 3, ..., 5}. What is the probability that the product of the numbers is even?
Answers
Answered by
oobleck
there are 5C2 = 10 pairs of numbers.
There are 3 odd numbers, and thus 3C2 = 3 pairs of odd numbers
That means that the product is even for the other 7 pairs, and so P(even) = 7/10
There are 3 odd numbers, and thus 3C2 = 3 pairs of odd numbers
That means that the product is even for the other 7 pairs, and so P(even) = 7/10
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