I really need help with this :/

Which expression is equivalent to 5r6141 2r+st6

20 only answer if 100% sure most high school-aged teens are very active. a. true b. false

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