A bag contains 20 identical red balls, 20 identical blue balls, 20 identical green balls, and 20 identical white balls. You reach in and grab 15 balls. How many different outcomes are possible?

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Q: 1. Construct a 90% confidence interval for p, the true proportion of all people who used the bus.…

A: Here use basic of confidence interval of proportion

Q: 2) 154, 133, 232, 267, 289, 274, 321, 348, 188, 439

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