1. ## Conditional Probability

for question (i) in the attachment,
the probibility is
P(Shopped *intersect* Female) = 50/200

is it correct?

2. Your attachment won't "enlarge" and I have trouble reading it as it is. It appears to be
*********Shopped*******not Shopped
Female***** 50 ************150
Male ****** 75 ************ 225

The probility that a person "shopped" given that the person is a female would be 50/200 because there are 50+150= 200 people.

But the probability that a person shopped and was a female- which is "female intersect shopped" and is NOT a "conditional" probability- would be 50/500 because there are a total of 50+150+ 75+ 225= 500.

3. Originally Posted by HallsofIvy
But the probability that a person shopped and was a female- which is "female intersect shopped" and is NOT a "conditional" probability- would be 50/500 because there are a total of 50+150+ 75+ 225= 500.
so.. the word and means intersect & ......given means conditional prob?
correct?

4. Originally Posted by nameck
so.. the word and means intersect & ......given means conditional prob?
correct?
Yes.