What is the renters rule

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

What is the average rate of change for this function for the interval from x=2 to x=4 ?

If m 17 27 90 63 ** picture is attached