For a certaincandy, 16% of the pieces areyellow, 15% are red,20% are blue, and the rest brown. Assume you have an infinite supply of these candy pieces from which to draw. If you pick three pieces in a row, what is the probability that at least one of them is not brown?

a. 0.49

b. 0.118

c. 0.882

d. 0.51

Consider two random events A and B. Event Ac is the complement of event A, and Bc is the complement of B. P(A) =0.79. P(B) = 0.07, and P(A and B) =0.0608. Then we can say that the two events A and B are:

a. Disjoint

b. Not independent

c. Independent

d. Both independent and disjoint

Mary is deciding whether to book the cheaper flight home from college after her finalexams, butshe's unsure when her last exam will be. She thinks there is only a 15% chance that the exam will be scheduled after the last day she can get a seat on the cheaper flight. If it is and she has to cancel theflight, she will lose $390. If she can take the cheaperflight, she will save $200. So, her Gain, for booking the cheaper flight, is a random variable. If she books the cheaper flight, what is the standard deviation of her Gain?

a. 235.67

b. 218.67

c. 210.67

d. 241.67