MathDB
Three-Digit Integers

Source:

November 26, 2009
probability

Problem Statement

A three-digit integer contains one of each of the digits 1 1, 3 3, and 5 5. What is the probability that the integer is divisible by 5 5? <spanclass=′latex−bold′>(A)</span> 16<spanclass=′latex−bold′>(B)</span> 13<spanclass=′latex−bold′>(C)</span> 12<spanclass=′latex−bold′>(D)</span> 23<spanclass=′latex−bold′>(E)</span> 56 <span class='latex-bold'>(A)</span>\ \frac{1}{6} \qquad <span class='latex-bold'>(B)</span>\ \frac{1}{3} \qquad <span class='latex-bold'>(C)</span>\ \frac{1}{2} \qquad <span class='latex-bold'>(D)</span>\ \frac{2}{3} \qquad <span class='latex-bold'>(E)</span>\ \frac{5}{6}
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