Two cars left an intersection at the same time, one heading south and one heading east. After one hour they were exactly 100 miles apart. The car that headed east had gone 20 miles farther than the car headed south. How far had the car going east traveled?

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