50, Axline Computers manufactures personal computers at two plants, one in Texas

Question

50, Axline Computers manufactures personal computers at two plants, one in Texas and the test other in Hawaii. The Texas plant has 40 employees; the Hawaii plant has 20. A randm sample of 10 employees is to be asked to fill out a benefits questionnaire. a. What is the probability that none of the employees in the sample work at the plan in SELF b. What is the probability that 1 of the employees in the sample works at the plant i c. What is the probability that 2 or more of the employees in the sample work at the plant d. What is the probability that 9 of the employees in the sample work at the plant in Texas Hawaii? Hawaii? in Hawaii?

Explanation / Answer

A. What is the probability that none of the employees in the sample work at the plant in Hawaii?

Ans: 40C10/60C10 = 0.0112
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B. What is the probability that 1 of the employees in the sample works at the plant in Hawaii?

Ans: (20C1*40C9)/(60C10) = 0.0725
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C. What is the probability that 2 or more in the sample work at the plant in Hawaii?
Ans: 1 - [0.0112+0.0725] = 0.9163
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D. What is the probability that 9 of the employees in the sample work at the plant in Hawaii?
Ans: [20C9*40C1]/60C10 = 0.00008911

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