That is a very simple mathematics question.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。, \& \7 B7 |! n- v7 l; w
Let x = Male, y = Female, z = Child
7 Z+ K3 |. o9 H+ y9 y公仔箱論壇6x + 3y + z/2 = 100 Formula 15.39.217.77:8898! B6 \ X# q! Q5 s% B: @8 k r9 g
x + y + z = 100 Formula 2
f1 I- o5 \" q4 L2 a5.39.217.77:8898Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.77:8898( }- `. N4 }+ t9 ~
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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。 u/ L/ D+ F. R7 C0 _
Formula 4 can change into 11x + 5y = 100 Formula 5
; `3 f! v S. M/ D5.39.217.77:8898In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.4 V6 w# n2 F. \$ T: Y! b
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.
- m5 [) d4 F! a/ [) ?Eventually, the answer is 20 female and 80 children and no male. |