统计概率的计算,Your store is interested in learning more about cust

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/23 16:56:39

统计概率的计算,
Your store is interested in learning more about customers’ purchasing
patterns and how they relate to the frequency of store visits.The probability
that a customer’s visit will result in a purchase is 0.35.The probability that
a customer has been to the store within the past month is 0.20.Of those who
did not buy anything,12% had been there within the past month.
a.Find the probability of making a purchase given that the customer had been to the store within the past
month.
b.What percent of customers are frequent shoppers,defined as making a purchase and having been to thestore within the past month?
答案分别是：0.61 & 0.122

a.0.20*0.35=0.07
b.0.20-(1-0.35)*0.12=0.122
再问：第一个答案是:0.61额。。
再答：题目的意义太拗口。 1.顾客进入商店后消费的概率是0.35。 2.顾客曾经在一个月内来过的概率是0.20. 3.没有消费的顾客中，12%的人一个月内没有来过。问：a.一个月内来过商店的顾客做出消费的概率。 b.常客，即一个月内来过并消费的顾客，的比例。这两问的意义哪里不同，我已经迷糊了。
再问：所以我拿上来问，老师讲得模模糊糊的或者是我就没听懂他说的
再答：能不能把0.61这个数字凑出来，反推回去看看

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