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 femalewould be 50/200 because there are 50+150= 200 people.

But the probability that a person shoppedandwas 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.