That is a very simple mathematics question. 8 \% V! v, R; g& o& l1 y5.39.217.76Let x = Male, y = Female, z = Child/ J; D/ z& {: R3 S
6x + 3y + z/2 = 100 Formula 10 C; K: u) c. \: Q" C
x + y + z = 100 Formula 2 g% ?9 E" k$ j+ E" aSimplify Formula 2 into z, we get z = 100 - x - y Formula 3 . W% C; y5 i. O3 z3 ?' ?6 K公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 2 V* W- p8 a" T. Y4 M7 l公仔箱論壇Formula 4 can change into 11x + 5y = 100 Formula 5 % L4 ^: G" v& \3 A2 x公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. . G& u4 C5 m& k( g公仔箱論壇And between 0 and 9, only 0 can give me a single number of y. So, x has to be 0 and y have to be 20. Then put x and y back to formula 1, we get z = 80.% T. {& v& V" T2 U; L. [) H
Eventually, the answer is 20 female and 80 children and no male.作者: alan1234 時間: 2007-10-14 12:19 AM 標題: two answers
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0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
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11X must be 0 or multiple of 5 # n. N" |( F( C) B7 K0 }: h) M/ q公仔箱論壇that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children . A# f6 l0 \5 _- ~, Ctvb now,tvbnow,bttvb5 male 9 F' ]) k" d/ M5 F; J! g
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
