That is a very simple mathematics question.
9 z4 Y1 ~, R7 G) t2 U# RTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。Let x = Male, y = Female, z = Child
- Y1 F& ?; v) i6 ktvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1公仔箱論壇. z) o8 L7 b" C C
x + y + z = 100 Formula 2
) h+ V; ]& H2 o4 N0 r8 Dtvb now,tvbnow,bttvbSimplify Formula 2 into z, we get z = 100 - x - y Formula 3: q0 ~6 z0 L7 T' [8 e
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
J! P- h4 Q# G9 v t0 Y% Ytvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 5" ?4 k+ @. g" e* M$ N
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
9 g5 W6 b# S6 J2 l6 k' N& U% ~TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。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.tvb now,tvbnow,bttvb6 r9 }* c. s' [( B
Eventually, the answer is 20 female and 80 children and no male. |
發表於 2007-10-13 05:08 PM
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