An ordinary deck of playing cards has 52 cards. There are four suitsspades, hearts, diamonds, and

clubswith 13 cards in each suit. Spades and clubs are black; hearts and diamonds are red. One of these cards is selected at random. Let A denote the event that a7 is chosen. Find the probability that a7 is chosen, and express your answer in probability notation.

Part 1

The probability that a7 is chosen is?