A theater charges different admission prices for adults and children. The total price of admission, in dollars, for a group of a adults and c children is 12a+8c. What is the total price of admission for 2 adults and 4 children?

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