An ordinary deck of playing cards has 52 cards. There are four suits-spades, hearts, diamonds, and clubs-with

Question:

An ordinary deck of playing cards has 52 cards. There are four suits-spades, hearts, diamonds, and clubs-with 13 cards in each suit. Spades and clubs are black; hearts and diamonds are red. If one of these cards is selected at random, what is the probability that it is
a. A spade?
b. Red?
c. Not a club?