A video game store was getting rid of old games, selling them 5 for $73.50. If they sold 3 games, how much moneh would they have made?

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Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15