Five bulbs of which three are defective are to be tried in two bulb points in a dark room.Number of trials the room shall be lighted is

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 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 box contains 10 bulbs, of which just three are defective. If a random sample of five bulbs is drawn , find the probabilities that the sample contains: Exactly one defective bulb. Exactly two defective bulbs. No defective bulbs.

A box contains 10 bulbs,of which just three are defective.If a random sample of five bulbs is drawn,find the probabilities that the sample contains: Exactly on defective bulb. Exactly two defective bulbs.No defective bulbs.

A box contains 10 bulbs, of which just three,are defective. If a random sample of five bulbs is drawn, find the probabilities that the sample contains: i) exactly one defective bulb (ii)exactly two defective bulbs (iii) no defective bulbs.

A box contains 5 bulbs of which two are defective.Test is carried on bulbs one by one untill the two defective bulbs are found out. Find the probability that the process stops after

Suppose there are three bags such that Bag A has 10 bulbs out of which 4 are defective. Bag B has 6 bulbs out of which 1 is defective Bag C has 8 bulbs out of which 3 are defective. A bag is chosen at random and then a bulb is randomly chosen from the chosen bag. (i) Find the probability that the bulbs is non-defective (ii) If the bulb is non-defective, find the probability that it came from bag C?

There are 15 bulbs in a room. Each one of them can be operated independently . The number of ways in which the room can be lighted is