Can somebody help me with 20 and 22? i have 19 and 21 just confused...
Thanks!

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.

At 6 1/2 cents per pound of string beans how much does 7 pounds cost

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).