96 passengers got off a train from Hong Kong at Shenzhen. 75% of the remaining passengers got off at Guangzhou . Finally 76 passengers were still on the train .
(a) Find the number of passengers on the train when the train left Shenzhen .
(b) Find the percentage of the passengers from Hong Kong who got off at Guangzhou
F.1 數學(英文)
2007-01-02 6:16 pm
回答 (2)
2007-01-02 6:40 pm
✔ 最佳答案
you should have learnt equation during primary, rite?(a) Let X be the remaining passengers on train when it left Shenzhen,
X(1-75%)=76
X=76 / (1-75%)
X=304
(b) Total number of Hong Kong passengers= 304 + 96
= 400
Number of passengers got off at Guangzhou = 304 x 75%
= 228
Percentage of passengers got off at Guangzhou = 228 / 400
= 57%
2007-01-02 10:51:21 補充：
其實你係唔明英文問乜,定係唔識條數點計呢?條問題係問:從香港出發的火車,有96位乘客在深圳落車,餘下的75%乘客在廣州落車,最後只剩76位乘客在火車上.(a)在深圳之後有多少位乘客仍在火車上?(b)在廣州落車的乘客佔所有乘客的百分比?
2007-01-02 6:23 pm
a)
96 + [76 / (1 - 0.75)]
= 400
b)
[(400 - 96) x 0.75 / 400] x 100%
= 57%
96 + [76 / (1 - 0.75)]
= 400
b)
[(400 - 96) x 0.75 / 400] x 100%
= 57%
收錄日期: 2021-04-12 21:24:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070102000051KK00757