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probability of defective versus non defective balls

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A batch of 100 Barbie dolls contains four (4) defective dolls. What is the probability that a sample of three (3) dolls from this batch will contain:
a) No defective dolls.
b) All defective dolls.
c) At least one defective dolls.
d) At least one non-defective doll.

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Solution Summary

The solution provides examples how to calculate the probability of defective versus non defective balls among the choices.

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Hi there,

Solution:
According to the statement, the probability of a doll being defective is 0.04.
Then the probability of a doll being non-defective is ...

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