That is a very simple mathematics question.
0 E5 r+ g: v, [8 r: NTVBNOW 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
+ E* G& u) b, r4 Fwww3.tvboxnow.com6x + 3y + z/2 = 100 Formula 1
: h$ J, e6 D( I$ d$ X* l公仔箱論壇x + y + z = 100 Formula 2
- t; q2 |; _8 X3 _Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
$ O1 X. x4 q3 c8 R1 l: \. ~5 n& D公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
" O9 m- y. o6 Z* x M: l1 Ltvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇) p4 J9 R# w; d8 x7 ?# ?' q& l# O0 ?7 p
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇+ m1 X4 J/ W' X7 Y1 w
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.公仔箱論壇& `/ ]& ^3 U+ j" l
Eventually, the answer is 20 female and 80 children and no male. |