10) For the event described below, which of the following represents the complement of the event. A sample of 477 software DVDs was selected. Fewer than 40 of these were defective. A) At least 40 DVDs were defective. B) At most 40 DVDs were not defective. ) More than 40 DVDs were not defective. D) Fewer than 40 DVDs were not defective. ID: BESB8e 4.16-7+ 11) An apartment building has the following distribution of apartments: 1 bedroom 2 bedroom 3 bedroom Ist floor 3 0 1 2nd floor 1 3 2 3rd floor 1 4 1 It an apartment is selected at random, what is the probability that it is on the 3rd floor or has 3 bedrooms? ID: BESB8e 4.26-1+ 12) Let 4 and B be events with P(4) = 0.8, P(8) = 0.5, and P(4 and B) = 0.40. Are 4 and B independent? A) Yes B) No I1D: BESB8e 4.3.1-2+ 13) On an eight-question true-false quiz, a student guesses each answer. What is the probability that the student gets none of the answers correct? I1D: BESB8e 4.3.4-5+ 14) Urn 1 contains 4 red balls and 6 black balls. Urn 2 contains 2 red balls and 5 black balls. Urn 3 contains 2 red balls and 4 black balls. If an urn is selected at random and a ball is drawn, find the probability it will be red. |D: BESB8e 4.3.6-2+