Please I really need help my grade depends on it

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

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3