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The A.B. Company buys calculators from a Korean supplier. The

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The A.B. Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. If 3 calculators are selected at random, what is the probability that one of the calculators will be defective? Show sufficient work to justify answer.

Hi there!

 

p = 0.1

n = 3

x = 1

 

p(1)

= 3 choose 1 * (0.1)^1 * (1-0.1)^(3-1)

= 3 * 0.1^1 * 0.9^2

= 0.243

 

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Thanks,

Scott

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