Help me with this please

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.

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

What is the product? a-3/15a × 5/a-3