I accidentally clicked on B. I don’t understand please help

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.

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

How do newtons third law of motion demonstrates on a rollar coster