Question

Out of 100 emails, 60 are spam and 48 of those contain the word buy. Of the remaining 40 emails that are not spam, only 4 emails contain the word buy. Given that an email is spam, what is the probability that it contains the word buy?

Answer 1

A. 0.80

Explanation:

100 total emails

60 spam, 40 not spam

Break down the amounts, out of the 60 spam there are 48 that have the word "buy", therefore 48/60 = 0.80

Answer 2

Well, it's not .92. I just tried and it was wrong