6. Out of fifteen managers, two will be selected at random to attend a regional marketing (2 points) conference. How many ways are there to select the two managers? A. 105 B. 210 C. 106 D. 205 7. If E and F are mutually exclusive events with P(E) = 0.5 and P(F) = 0.5, then P(E U F) = (2 points) A. 1 B. 0.15 C. O D. 0.25 8. If C and D are independent events with P(C) = 0.1 and P(D) = 0.4, then (2 points) A. P(C | D) = 0.4 B. P(D | C] = 0.1 C. P(C U D) = 0.46 D. P(C n D) = 0.5 9, If P(A) = 0.64, P(B) = 0.56, and P(A U B) = 0.70, then P(B | A) = 3654 (2 points) A. 0.3584 B. 0.7813 C. 0.8929 D. 0.5120 .45 2 10. If G and H are independent events with P(G) = 0,4 and P(H) = 0.25, then P(G U H) = (2 points) A. 0.65 B. 0.74 C. 0.56 D. 0.09A. 0.4734 B. 0.0581 C. 0.1103 D. 0.0522 13. If a randomly selected subscriber is among the subscribers who own a credit card other than (2.5 points) American Express, find the probability that the subscriber's annual income is not over $75,000. A. 0.0816 B. 0.0522 C. 0.9814 D. 0.1633 14. If a randomly selected subscriber is among the subscribers whose annual income is not over (2.5 points] $75,000, find the probability that the subscriber owns a credit card other than American Express. A. 0.0816 B. 0.0522 C. 0.9814 D. 0.1633