The phone lines to an airline reservation system are occupied 30% of the time. Assume that the events that the lines are occupied on successive calls are independent. Assume that 10 calls are placed to the airline. What is the probability the lines are occupied in fewer three calls? Let X be a binomial random variable that denote the number of times the line is occupied (Show solution). a. 0.2150 O b.0.2668 O.0.3828 O d. NONE

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