Question

Northside's Drum and Bugle Corps raised money for a trip. The drummers and bugle players kept separate sales records. According to the double bar graph of monthly sales below, in what month did one group's sales exceed the other's by the greatest percent?

Jan

Feb

Mar

Apr

May

Solution:

Reading the graph gives (drums, bugles): January $(7, 9),$ February $(5, 3),$ March $(9, 6),$ April $(9, 12),$ and May $(8, 10).$

The percent excess of the larger over the smaller is $\tfrac{2}{7} \approx 29\%$ in January, $\tfrac{2}{3} \approx 67\%$ in February, $\tfrac{3}{6} = 50\%$ in March, $\tfrac{3}{9} \approx 33\%$ in April, and $\tfrac{2}{8} = 25\%$ in May. The greatest is February, where $5$ exceeds $3$ by about $67\%.$

Thus, the correct answer is B .

1992 AMC 8 Problem 21

Solution:

Problem 21 in Other Years