HW 13-3 Binomial Expansion
Name _________________________
5. The probability of Ruffian winning a horse race against Thunder’s Choice is two out of three.
What is the probability that Ruffian wins exactly three of the next four races against Thunder’s
Choice?
(A)
8
81
(B)
32
81
(C)
27
256
(D)
108
256
6. There are 4 blue and 6 yellow marbles are in a bag. A marble is drawn at random and replaced
after each draw. If five draws are made, what is the probability that at least four yellow marbles
will be drawn?
(A)
720
3125
Normal Distribution Review
(B)
900
3125
(C)
1053
3125
(D)
1440
3125