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A room contains 3 sockets for bulbs. If ...

A room contains 3 sockets for bulbs. If from a collection of 10 bulbs, out of which 6 are defective, 3 bulbs are selected at random and put in the sockets, then the probability that the room is lighted is

A

a) 3/5

B

b) 1/5

C

c) 5/6

D

d) 1/6

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