That is a very simple mathematics question.
( V( O' |, ]7 T4 A* cLet x = Male, y = Female, z = Child
* b3 B- C8 O: d( Q# Z公仔箱論壇6x + 3y + z/2 = 100 Formula 1TVBNOW 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。' V; v m$ H' A7 F2 h% @8 P" b
x + y + z = 100 Formula 2
8 l1 n, Z) \8 T5.39.217.76Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
/ H8 V5 Z; T1 [$ ESub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇5 l) w3 T# l$ p6 Q$ [
Formula 4 can change into 11x + 5y = 100 Formula 5
1 `/ ^+ o6 c( Y8 h3 k% |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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
& a* u( Z1 u0 z0 lAnd 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.
* l& C. k; A8 ?( j! c: oTVBNOW 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。Eventually, the answer is 20 female and 80 children and no male. |