Find the probability that at most 5 defective fuses will be found in a box of 200, if experience shows that 20% of such fuses are defective

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find the probability that at most 5 defective fuses will be found in a box of 200, if experience shows that 20% of such fuses are defective
There are 1000 pages in a book out of which 100 pages are defective. What is the probability that out of first 50 pages 10 pages will be defective?
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Answers

2015-03-10T20:12:25+05:30
20%of 200=40
so there are 40 fuses which are defective
the probability of finding 5 defectives= 5/40=1/8
i think it is the ans
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