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1. In a class of 60 students, the number of boys and girls participating in the annual sports is in the ratio 3 : 2 respectively. The number of girls not participating in the sports is 5 more than the number of boys not participating in the sports. If the number of boys participating in the sports is 15, then how many girls are there in the class ?






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  • By: guest on 02 Jun 2017 02.07 am
    Let the number of boys and girls participating in sports be 3x and 2x respectively.Then, 3x = 15 or x = 5.So, number of girls participating in sports = 2x = 10.Number of students not participating in sports = 60 - (15 + 10) = 35.Let number of boys not participating in sports be y.Then, number of girls not participating in sports = (35 -y).Therefore (35 - y) = y + 5 2y 30 y = 15.So, number of girls not participating in sports = (35 - 15) = 20.Hence, total number of girls in the class = (10 + 20) = 30.
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