Suppose one card is selected at random from an ordinary deck of 52 playing cards.

Question

Let

A= event a diamond is selected
B=event a club is selected

Determine P(A|(not B))

Could some one explain this to me and tell me how they got the answer

Answer 1

if NOt B, then the card has to be a diamond, heart, or spade.

Pr(A|NOT B)=1/3