a room has 3 sockets for lamps From a collection of 10 lights bulbs of which 6 are defective a person sects 3 bulbs at random and puts them in socket What is the probability that the room is lit

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Please find below the solution to the asked query :

Probability Not getting light=Number of ways of selecting 3 defective bulbsTotal number of ways of selecting bulbs=c36c310=6!3! 3!10!7! 3!=20120=16Probability Room is lit=1-Probability Not getting light=1-16=56   ANS...
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