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When circuit boards used in the manufacture of compact disc players are tested, the percentage of...

When circuit boards used in the manufacture of compact disc players are tested, the percentage of defectives is 10%. Let X = the number of defective boards in a random sample of size n = 10.

a.What kind of distribution does X have (name and values of all parameters)?

b.Calculate the expected value and standard deviation of X.

c.Determine P(2 ≤ X).

d.What is the probability that none of the 10 boards is defective?

Math   Statistics-And-Probability   
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