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標題:

4人吃「三送一」,計AA制各人要出多少錢

發問:

要有步驟解釋 和答案. 有快速計法更佳. A君吃餐$52. B君吃餐$62. C君吃餐$68. D君吃餐$72. 餐廳優惠「三送一」, 減免最便宜的餐的價錢. 加一以及 付貼士後 共$230. 4人AA制, 減免的當是折扣. 計各人分別要出多少錢. 更新: 4人AA制, 不是平均攤分啊! 吃貴餐的要付多些, 即是要按比例. 人人要付的不同. 謝謝.

最佳解答:

total cost before discount = (52+62+68+72) x 110% = 254 x 110% = 279.4 to calculated the individual cost by proportion: A = (52 x 110%)/ 279.4 x 230 = 47.1 B = (62 x 110%)/ 279.4 x 230 = 56.1 C = (68 x 110%)/ 279.4 x 230 = 61.6 D = (72 x 110%)/ 279.4 x 230 = 65.2 47.1 + 56.1 + 61.6 + 65.2 = 230

其他解答:

(nearest to 1 d.p.) 原本要俾 (52+62+68+72) = 254 最後Actual paid = 230 所以按比例計返每人要俾幾錢: A = 230*(52/254) = 47.1 B = 230*(62/254) = 56.1 C = 230*(68/254) = 61.6 D = 230*(72/254) = 65.2|||||First, A is not calculated Second +10% + tips = ($62 + $68 + $72 )x 110% = $230 ( Corr. to 3 sig. fig. ) Third, AA form, so each people have to pay: $230 / 4 = $57.5 Finally, each people have to pay $57.5 希望幫到你C8D74AB62542840B