呢條題目講緊咩?點做?
A boy has twenty $2 coins and twenty $5 coins.In how many ways can he buy a gift that costs $96 if he pays the exact price for the gift ?
更新1:
大大感謝各位既幫忙!!! 小弟感激不盡!!!
大大感謝各位既幫忙!!! 小弟感激不盡!!!
收錄日期: 2021-04-23 17:18:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070826000051KK03183