Given: A box containing 30 bulbs of which 5 are defective.Each trail is independent of the other trial.
To find: the probability that both the bulbs are chosen are defective.
Let , success :bulb chosen is defective .i.e
Now , the Probability of success in the first trial is
Probability of success in the second trial without replacement of the first draw is given by
Hence , the probability that both the bulbs are chosen are defective,with each trial being independent is given by
P1 P2 = =
Rate this question :
Coloured balls arMathematics - Board Papers
If A and B are twMathematics - Board Papers
Prove that if E aMathematics - Board Papers