SOLUTION: The probability that a bolt is defective is 0.2%. Bolts are packed in boxes of 500. Use the information to answer the questions below. a) Find the probability that in a randomly

Question 1175878: The probability that a bolt is defective is 0.2%. Bolts are packed in boxes
of 500. Use the information to answer the questions below.
a) Find the probability that in a randomly chosen box, there are two
defective bolts.
b) Find the probability that in a randomly chosen box, there more than three
defective bolts

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!


Hi
Binomial Distribution:  p = .002
n = 500
P(x = 2) = binompdf(500, .002,2) = .1841

P(x ≥ 3) = 1 - P( x ≤ 2) = 1 - binomcdf(500, .002, 2) = 1 - .9199 = .0801

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