Question

Qualitycontrol team in industry found that 25% are defective on a particular days production. what in the probability that in a batch of 6 items atleast4 are not defective?
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Answer 1

Explanation:

To find the probability of at least one of something, calculate the probability of none and then subtract that result from 1. That is, P(at least one) = 1 – P(none). Topford supplies X-Data DVDs in lots of 50, and they have a reported defect rate of 0.5% so the probability of a disk being defective is 0.005.