Problem:
Two different numbers are randomly selected from the set and multiplied together. What is the probability that the product is
Answer Choices:
A.
B.
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E.
Solution:
There are possible pairs of numbers. For a product to be , either the first factor or the second factor must be , so there are such products. The desired probability is .
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions