please explain the answer

Activity In this activity, you will use proportional relationships to predict how many times an event should occur for a certain number of trials, A standard deck of playing cards has four suits: hearts, diamonds, clubs, and spades. Each suit has 13 cards, from ace to king. Use this information to answer the following questions. Part A What is the ratio of threes to the total number of cards in the deck? B / U X X2 15px