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Mary's Books

Source: AMC 10 2010A Problem 1

February 10, 2010
AMC

Problem Statement

Mary's top book shelf holds five books with the following widths, in centimeters: 6 6, 12 \frac12, 1 1, 2.5 2.5, and 10 10. What is the average book width, in centimeters? <spanclass=′latex−bold′>(A)</span> 1<spanclass=′latex−bold′>(B)</span> 2<spanclass=′latex−bold′>(C)</span> 3<spanclass=′latex−bold′>(D)</span> 4<spanclass=′latex−bold′>(E)</span> 5 <span class='latex-bold'>(A)</span>\ 1 \qquad <span class='latex-bold'>(B)</span>\ 2 \qquad <span class='latex-bold'>(C)</span>\ 3 \qquad <span class='latex-bold'>(D)</span>\ 4 \qquad <span class='latex-bold'>(E)</span>\ 5
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