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3. Chris knows that his chance to catch an elevator without having to wait for it on a Monday is 1, while on a Tuesday or a Wednesday, he is twice as likely to wait as he is not to wait. He will choose one of these days: Monday with probability 0.4, Tuesday with probability 0.3, and Wednesday with probability 0.3 for his elevator ride. What is the probability that he has to wait for the elevator? (A) 0.8 (B) # (C (D) E) 0.6
Harold loves to eat cookies. He eats 1/4 of the package on Monday. On Tuesday, he eats 13 cookies. On Wednesday, he eats 1/2 as many as he did on Monday. If there are 22 cookies left in the package on Thursday, how many cookies did he start with?
