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Suppose that in an assortment of 30 calculators there are 5 with defective switches. Draw with...

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Basic Math

Suppose that in an assortment of 30 calculators there are 5 withdefective switches. Draw with and without replacement. (Enter theprobabilities as fractions.)

(a) If one machine is selected at random, what is theprobability it has a defective switch?

with replacement

without replacement

(b) If two machines are selected at random, what is theprobability that both have defective switches?

with replacement

without replacement

(c) If three machines are selected at random, what is theprobability that all three have defective switches?

with replacement

without replacement

Answer & Explanation Solved by verified expert
4.5 Ratings (844 Votes)
a If one machine is drawnor selected then probaility that this would be defective is 530 or 16 There is no question of replacement or without replacement because there is no further machine selection Prob of selecting defective macine 16 b If two machines are selected then probability of first machine being defective would be    See Answer
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