數學,多少倍?

2008-11-25 2:10 am
ABC商店按原定價錢出售,每件利潤為成本的25%,後來按原定價的
90%出售,獲得利潤比原本卻增加了25%。那麼降價後銷售量是原價銷售量的多少倍?

回答 (3)

2008-11-25 2:43 am
✔ 最佳答案
Let cost = c
original sales quantity = q.
Selling price = c(1 + 25%) = 1.25c
Profit = 1.25cq - cq = 0.25cq.
New selling price = 1.25c(90%) = 1.125c
New quantity = Q,
so Profit = 1.125cQ - cQ = 0.125cQ.
Since profit increase by 25%, that is
(0.125cQ - 0.25cq)/0.25cq x 100% = 25%
(Q/8 - q/4)/(q/4) = 1/4
(Q - 2q)/8 = q/16
2(Q - 2q) = q
2Q - 4q = q
2Q = 5q
Q/q = 5/2 = 2.5 times.
2008-12-17 1:33 am
冥王子不要亂說
2008-12-09 2:27 am
請問關銷售量甚麼事?

我假設1件貨品10蚊, 來價5蚊, 你每件貨品賺5蚊
10件貨品, 你就賺50, 成本50, 100件就賺500, 成本500, 如此類推
現在你1件貨品8蚊, 來價都係5蚊, 你每件貨品賺3蚊
10件貨品, 你就賺30, 成本50, 100件就賺300, 成本500, 如此類推

問題係, 無論你賣幾多件貨品, 上式都係賺50%, 下式都係賺30%
既然係咁, 請問關銷售量甚麼事呢?


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