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發問:

若1D班有42名學生,男生人數比女生人數多1/3,問男生和女生各有多少人?

最佳解答:

若1D班有42名學生,男生人數比女生人數多1/3,問男生和女生各有多少人? 設女生有x人,男生有(x+1/3x). 42=(x+1/3x)+x 42=7/3x 42*3/7=x x=18 所以女生有18人, 男生有: 18+18(1/3) =24 即男生有24人

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其他解答:

設女生人數是x 男生人數是x+1/3 x+x+1/3=42 2x+1/3=42 6x+1=126 6x=125 x=125/6 男生人數是127/6 女生人數是125/6|||||男生有: 42/2*1/3+42/2 =7+21 =28(人) 女生有: 42-28 =14(人)|||||Let x be the number of girls Therefore the number of boys should be (x + 1/3x) (x + 1/3x) + x = 42 2x + 1/3 x = 42 (6x + x)/3 = 42 7x = 126 x = 18 The number of girls is 18 and the number of boys is 24.|||||Let x and 4/3x be the number of girls and boys in the class respectively x+4/3x=42 (1+4/3)x=42 7/3x=42 x=42*3/7 x=18 Therefore, there are 18 girls and 24 boys in the class|||||let x be the number of girls (x+1/3x)+x=42 2x+1/3x=42 x=18 the number of boys =42-18 =34 2006-12-07 22:46:07 補充: the number of boys=42-18=24|||||let no. of girls is X no. of boys is (1 1/3)X X+4X/3=42 7X/3=42 X=18 So, there are 18 girls and 24 boys|||||設女生人數是x, x+x+1/3x=42 2x+1/3x=42 2又1/3x=42 x=18 女生人數是18人, 男生人數=42-18=24人
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