Can ya help me with the answer please and thank you so much

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

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25