Question
In a class of 720 students, the ratio of boys to girls is
3:2. Additionally, among the boys, the ratio of those who participated in dancing to those who participated in singing is 5:4. If every boy took part in either dancing or singing, determine the number of boys who participated in dancing.Solution
Number of boys in the class = 720 × 3/5 = 432
Number of boys who participated in dancing = 432 × 5/9 = 240
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