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Probability that more pc purchasers bought dell computer

Market researcher Gartner Dataquest reports that Dell Computer controls 27% of the PC market in the United States. Suppose a business researcher randomly selects 130 recent purchasers of PC.

a. What is the probability that more than 39 PC purchasers bought a Dell computer?

b. What is the probability that between 28 and 38 PC purchasers (inclusive) bought a Dell computer

c. What is the probability that fewer than 23 PC purchasers bought a Dell computer?

d. What is the probability that exactly 33 PC purchasers bought a Dell computer?

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Basic Statistics: Probability that more pc purchasers bought dell computer

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