The probability that your call to a service line is answered in less than 30 seconds is 0.75. Assume that your calls are independent. What is the probability that you must call six times in order for two of your calls to be answered in less than 30 seconds?
Added by Ayesha Z.
Step 1
This distribution describes the number of trials needed to get a certain number of successes, where each trial is independent and has the same probability of success. In this case, we want to know the probability that we need six trials (calls) to get two Show more…
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The probability that your call to a service line is answered in less than 30 seconds is $0.75 .$ Assume that your calls are independent. (a) What is the probability that you must call six times in order for two of your calls to be answered in less than 30 seconds? (b) What is the mean number of calls to obtain two answers in less than 30 seconds?
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The probability that your call to a service line is answered in less than 30 seconds is 0.75. Assume that your calls are independent. What is the probability that you must call six times in order for two of your calls to be answered in less than 30 seconds? (a) 0.011 (b) 0.013 (c) 0.022 (d) 0.033 (e) none of these Solution: (5 over 1) (0.75)^1(0.25)^4 x 0.75 = 0.011
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