You roll a standard 6-sided dice, what is the probability of rolling a number greater than or equal to 5? A) 1/3
B)1/2
C)2/3
D)1/4

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