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AHSME 1950- part 2

Source:

July 19, 2008
percent

Problem Statement

Successive discounts of 10%10\% and 20%20\% are equivalent to a single discount of:
<spanclass=′latex−bold′>(A)</span> 30%<spanclass=′latex−bold′>(B)</span> 15%<spanclass=′latex−bold′>(C)</span> 72%<spanclass=′latex−bold′>(D)</span> 28%<spanclass=′latex−bold′>(E)</span> None of these<span class='latex-bold'>(A)</span>\ 30\% \qquad <span class='latex-bold'>(B)</span>\ 15\% \qquad <span class='latex-bold'>(C)</span>\ 72\% \qquad <span class='latex-bold'>(D)</span>\ 28\% \qquad <span class='latex-bold'>(E)</span>\ \text{None of these}
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