# Binomial Probability: Arrival of Northwest Airlines

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Assume the likelihood that any flight on Northwest Airlines arrives within 15 minutes of the scheduled time is .90. We select four flights from yesterday for study.

1. What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time?

2. What is the likelihood that none of the selected flights arrived within 15 minutes of the scheduled time?

3. What is the likelihood at least one of the selected flights did not arrive within 15 minutes of the scheduled time?

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##### Solution Summary

This solution provides a step by step method for the calculation of the binomial probabilities of arrivals for the Northwest Airlines within the scheduled time. Formulas for the calculations and interpretations of the results are also included. A Word file is also attached which contains the formula required for this solution.

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Please view the attached file to see the formula and chart which has been computed for this solution.

1. What is the likelihood that all four of the selected flights arrived within 15 minutes of ...

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