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    Study of laid off teachers; J.O. Supplies Co defective calculators

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    Please answer those questions in Excel only, in Excel please show your work, steps and formulas.

    4. In a study conducted for the State Department of Education, 30% of the teachers who left teaching did so because they were laid off. Assume that we randomly select 10 teachers who have recently left their profession. Find the probability that more than 4 of them were laid off.

    5. The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. If 15 calculators are selected at random, what is the probability that 3 or more of the calculators will be defective?

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    Solution Summary

    The expert examines the study of laid off teachers. The defective calculations for Supplies Co is determined.