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s1 數學難題!!

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In a school,45% of the boys and 35% of the girls wear glasses.If the number of boys and the number of girls who do not wear glasses are 352 and 364 respectively(分别),find the total number of number of students in school. 正確答案應是 1200,但我只要列式

最佳解答:

let B, G be the total number of boys and girls boys do not wear glasses = B (1-45%) = 352 => B = 640 girls do not wear glasses = G (1-35%) = 364 => G = 560 thus, the total number of students = 640+560 = 1200

其他解答:

您好,我是 lop,高興能解答您的問題。 The total number of number of students in school is : 352 ÷ ( 1 - 45% ) + 364 ÷ ( 1 - 35% )|||||let total number of boy=x,girl=y x(1-45%)=352 x=640 y(1-35%)=364 y=560
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