SAT OG 第一版最后一道数学题.To cerebrate a colleague's graduation,the m coworkers in an office agreed to contribute equally to a catered lunch that costs a total of y dollars.If p of the coworkers fail to contribute,which of the following represents the additional
2019-05-23
SAT OG 第一版最后一道数学题.
To cerebrate a colleague's graduation,the m coworkers in an office agreed to contribute equally to a catered lunch that costs a total of y dollars.If p of the coworkers fail to contribute,which of the following represents the additional amount,in dollars,that each of the remaining coworkers must contribute to pay for the lunch?
(A) y/m
(B) y/(m-p)
(C) py/(m-p)
(D) y(m-p)/m
(E) py/m(m-p)
我选的B.
优质解答
你回答的选项是最终支付的人,每个人所支付的实际钱数.
题意是这样的,有m个人去聚餐,总价是y,结果m个人中有p个人没有支付,那么剩余的（m-p）个人就要平摊总价y.然后题目是问这（m-p）个人,每个人需要多支付的钱数.注意题目中：the additional amount（多付的数量）,the remaining coworkers（指付款的m-p个人）.
了解了题目,直接解答,先求刚开始预定的时候,每个人应支付的钱数：y/m.
最终m-p个人应支付的钱数：y/(m-p).两者一减,y/(m-p)-y/m,化简式子,结果就是E了.
你回答的选项是最终支付的人,每个人所支付的实际钱数.
题意是这样的,有m个人去聚餐,总价是y,结果m个人中有p个人没有支付,那么剩余的（m-p）个人就要平摊总价y.然后题目是问这（m-p）个人,每个人需要多支付的钱数.注意题目中：the additional amount（多付的数量）,the remaining coworkers（指付款的m-p个人）.
了解了题目,直接解答,先求刚开始预定的时候,每个人应支付的钱数：y/m.
最终m-p个人应支付的钱数：y/(m-p).两者一减,y/(m-p)-y/m,化简式子,结果就是E了.