Please some explanation

A standard deck of cards contains 52 cards. One card is selected from the deck. (a) Compute the probability of randomly selecting a seven or nine. (b) Compute the probability of randomly selecting a seven or nine or ten. (c) Compute the probability of randomly selecting a nine or club. a. P(seven or nine) = (Round to three decimal places as needed.) b. P(seven or nine or ten) = (Round to three decimal places as needed.) c. P(nine or club) (Round to three decimal places as needed.)