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Question
What is the probability that the product of two integers ( not necessarily different integers ) randomly selected from the numbers 1 through 20, inclusive , is odd ?
2/3
1/4
1/2
3/4
None of them
ANSWER : 2
Descrption
Total integers; 20 <br/> even = odd = 10 <br/> Since odd x odd = odd and since half the integers 1 to 20 are odd, the probability of selecting two odd integers is 1/2 x 1/2 = 1/4.
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