PRINTABLE VERSION Quiz 11 Question 1 An urn contains 14 white balls and 15 red balls. A sample of four balls is selected at random from the urn. What is the probability that the sample contains two white balls and two red ones? a) 0.1434 b) 0.0425 c) 0.2241 d) 0.0447 e) 0.4023 f) None of the above. Question 2 What is the probability that 5 hearts are chosen if 7 cards are chosen from a well-shuffled deck of 52 playing cards? a) 0.00000049 b) 0.00000026 c) 0.00712838 d) 0.00000962 e) 0.00000016 f) None of the above. Question 3 An urn contains 11 white balls and 10 green balls. A sample of seven is selected at random. What is the probability that the sample contains at least one green ball? a) 0.0001 b) 0.0397 c) 0.9603 d) 0.9972 e) 0.9999 f) None of the above. Question 4 A business organization needs to make up a 7 member fund-raising committee. The organization has 6 accounting majors and 7 finance majors. What is the probability that at least 4 accounting majors are on the committee? a) 0.3059 b) 0.0122 c) 0.0128 d) 0.3834 e) 0.0775 f) None of the above. Question 5 A fair coin is tossed 29 times. What is the probability that at most 27 heads occur? a) 0.00000076 b) 0.00000006 c) 0.00000081 d) 0.99999994 e) 0.99999919 f) None of the above. Question 6 A fair coin is tossed 25 times. What is the probability that at least 3 tails occur? a) 0.000068545 b) 0.999921739 c) 0.999990284 d) 0.000000030 e) 0.999990314 f) None of the above. Question 7 A business organization needs to make up a 6 member fund-raising committee. The organization has 9 accounting majors and 8 finance majors. What is the probability that at most 2 accounting majors are on the committee? a) 0.0059 b) 0.2466 c) 0.0023 d) 0.2443 e) 0.0036 f) None of the above. Question 8 A classroom of children has 18 boys and 19 girls in which five students are chosen at random to do presentations. What is the probability that more boys than girls are chosen? a) 0.1334 b) 0.4731 c) 0.0197 d) 0.4535 e) 0.3398 f) None of the above. Question 9 A toy manufacturer inspects boxes of toys before shipment. Each box contains 10 toys. The inspection procedure consists of randomly selecting three toys from the box. If one or more of the toys are defective, the box is not shipped. Suppose that a given box has two defective toys. What is the probability that it will be shipped? a) 0.5333 b) 0.3571 c) 0.0667 d) 0.8824 e) 0.4667 f) None of the above