1986 AJHSME Problems/Problem 16
A bar graph shows the number of hamburgers sold by a fast food chain each season. However, the bar indicating the number sold during the winter is covered by a smudge. If exactly of the chain's hamburgers are sold in the fall, how many million hamburgers are sold in the winter?
What we want to find is the number of hamburgers sold in the winter. Since we don't know what it is, let's call it . From the graph, we know that in Spring, 4.5 million hamburgers were sold, in the Summer was 5 million and in the Fall was 4 million. We know that the number of hamburgers sold in Fall is exactly of the total number of hamburgers sold, so we can say that...
The answer is 2.5, or