數學f2. 比和率

(a)綠茶的份量是:
500*(19/20) = 475(mL)
(b)蜜糖份量是:
300*(1/10) = 30(mL)
(c)混合茶中綠茶的份量是:
(500 300)*[(19 9)/(20 10)] = 2240/3 (mL)
混合茶中蜜糖的份量是:
(500 300)*[(1 1)/(20 10)] = 160/3 (mL)
所以 混合茶中綠茶和蜜糖的份量之比是:
(2240/3):(160/3)
= (2240/3)/(160/3)
= 2240/160
= 14/1
= 14:1