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A carton contains 12 light bulbs of which 3 are defective. If a random sample of 4 light bulbs is chosen without replacement, what is the probability distribution of defective light bulbs?

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A carton contains 12 light bulbs of which 3 are defective. If a random sample of 4 light bulbs is chosen without replacement, what is the probability distribution of defective light bulbs?

anonymous · Answer

you know what you have to do here?

anonymous · Answer

you pick 4 light bulbs
none could be defective
one could be defective
two could be defective
three could be defective
you have to compute each of those probabilities

anonymous · Answer

what do you mean by compute?

anonymous · Answer

find ?

anonymous · Answer

find the probability that no light bulbs are defective for example

anonymous · Answer

oh ok

anonymous · Answer

you have to do it for all the possibilities

anonymous · Answer

so 0/4, 1/4, 2/4, 3/4

anonymous · Answer

i kind of doubt it

anonymous · Answer

so what do you do to find the answer?

anonymous · Answer

as a matter of fact i am sure it is wrong
what i the probability that out of the 4 light bulbs none are defective?

anonymous · Answer

4/4 could be not defective