Harrison Water Sports has two retail outlets: Vancouver and Victoria. The Vancouver store does 60 percent of the total sales in a year, and Victoria the remainder. Further analysis indicates that of the sales in Vancouver, 45 percent are for "boat accessories". Sales of boat accessories at the Victoria store is 35 percent. For a random sale at Harrison Water Sports, find the probability, using a probability tree or otherwise, that the sale was made at the Vancouver store OR was for boat Accessories.

a. 0.69

b. 0.74

c. 0.82

d. 0.79

Because some passengers who make flight reservations do not showup to claim their reservations , airlines often overbook flights. A certain flight has capacity of seating 154 passengers. The airline believes that the rate of passenger"no-show" is 7% and has made reservations for 156 passengers for this flight. Let random variable X be the number of "no-show"s for this flight. Then E(X), the expected value of X, is:

a. 10.92

b. 10.78

c. 10

d. 11

An insurance company estimates that it should make an annual profit of $210 on eachhomeowner's policywritten, with a standard deviation of $5000. If the company writes only two of thesepolicies, the standard deviation of the annualprofit, in dollars, is:

a. 1768

b. 10000

c. 7071

d. 2357