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QUESTION 1 One percent of all electronic watches are manufactured by a reputable company is damaged and needs to be repaired within one year from
QUESTION 1 One percent of all electronic watches are manufactured by a reputable company is damaged and needs to be repaired within one year from the date of purchase. Seven pieces a similar watch was sold by a watch shop. Assume Y is random variable binomials represent the number of hours that are broken and need to be repaired within a year, a} What is the probability that none of the watches will need to be repaired within a year? b} What is the probability that at least 4 hours will need to be repaired in period of a year? c] what is the min value and variance for K? QUESTION 2 A study that has been conducted claims on average 2 high powered motorcycles traverse a study area within an hour. What is the probability of getting 2 a high powered motorcycle crosses the study area in 15 minutes? QUESTION 3 One study claimed that the time spent by adult males was reading daily pras was almost normally distributed with a mean of 42.4 minutes and a standard deviation of 15.3 minutes. If an adult male is chosen at random, what is the probability of that the time he spends reading the newspaper a day is, a] mminutesormore? b} between 35 and 45 minutes? c] at least ED minutes
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