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There are 42 students in F.1A.The number of boys is 1/3(3份之1) more than that of girls.Find the numbers ofboys and girls respectively. 我要let x be the numbers of boys , let y be the numbers of girls THX~
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let x be the numbers of boys , let y be the numbers of girls As the number of boys is 1/3(3份之1) more than that of girls. so, x = (1+1/3)y x = 4/3 y as there are 42 students, so x+y = 42 4/3y + y = 42 7/3y = 42 y = 18 so x = 42 - y = 42 - 18 = 24 Ans: There are 24 boys and 18 girls in F.1A 希望幫到你
其他解答:
There are 42 students in F.1A.The number of boys is 1/3(3份之1) more than that of girls.Find the numbers ofboys and girls respectively. 我要let x be the numbers of boys , let y be the numbers of girls let x be the numbers of boys , let y be the numbers of girls The number of boys is 1/3(3份之1) more than that of girls, then x = (1+1/3)y x = (4/3)y, or y = (3/4)x The number of boys + that of girls = 42, then x + y = 42, which can be written as x + (3/4)x = 42 (7/4)x = 42 x = 42 * 4 ÷ 7 x = 24, and y = (3/4)x y = 24 * 3 ÷ 4 y = 18 Ans: There are 24 boys and 18 girls in F.1A respectively.
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