A room has three sockets for bulbs from a collection of 10 lights bulbs of which 6 are defective, a person select 3 at random and puts them in the sockets . what is the probability that the room is lighted?
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vaishnavi2448:
but ans is 5/6 then i want how is it
Answer must be wrong. Think with some concience. How is it going to be 5/6. If there are only 4 good bulbs
Will you have a chance of piking three good bulbs 5 times in 6 chances.
Absolutely not.
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