Aclub has members from three grades. it has 36 from sixth grade, 24 from seventh grade, and 30 from eighth grade. what is the ratio of seventh graders to eighth graders

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.

Which representation has a constant of variation of -2.5

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?