SOLUTION: please help me in alot of 50 light bulbs there are 2 bad bulbs an inspector examine 5 bulbs which are selected at random and without replacement 1. find the probabability of

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Question 59205: please help me
in alot of 50 light bulbs there are 2 bad bulbs an inspector examine 5 bulbs which are selected at random and without replacement
1. find the probabability of at least 1 defective bulb amont the 5
2. how many bulbs should be examine so that the probability of
finding at least 1 bad bulb exceeds 0.5 ?
Answer by stanbon(48568) (Show Source):
You can put this solution on YOUR website!
in alot of 50 light bulbs there are 2 bad bulbs an inspector examine 5 bulbs which are selected at random and without replacement
1. find the probabability of at least 1 defective bulb amont the 5
P(at least 1 defective bulb)=1-P(none defective)
=1-[48C5/50C5]=0.1918...
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2. how many bulbs should be examine so that the probability of
finding at least 1 bad bulb exceeds 0.5 ?
??
Cheers,
Stan H.