A month of the year is chosen at random. What is the probability that the month starts with the letter J or the letter M?




All freshmen, sophomores, juniors, and seniors attended a high school assembly. The total student attendance is shown in the table.





A six-sided number cube is rolled twice.What is the probability that the first roll is an even number and the second roll is a number greater than 4?




Under the best conditions, a sprout has a 40% probability of blooming.If two sprouts are selected at random, what is the probability that both will bloom, under the best conditions?
The people who responded to a survey reported that they had either brown, green, blue, or hazel eyes. The results of the survey are shown in the table.





The probability for event A is 0.4, the probability for event B is 0.2, and the probability of events A and B is 0.1.Why are the events not independent?
A bag contains eleven equally sized marbles, which are numbered.





A bicycle manufacturer is studying the reliability of one of its models. The study finds that the probability of a brake defect is 4 percent and the probability of both a brake defect and a chain defect is 1 percent.If the probability of a defect with the brakes or the chain is 6 percent, what is the probability of a chain defect?
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