Q. 203.5( 2 Votes )

A bag contains 4 red, 5 black and 6 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is:

(i) white

(i) red

(iii) not black

(iv) red or white

Answer :

Here, n(S) = 15

(i) n(E) = 6



(ii) n(E) = 4



(iii) number of events of getting black balls, n(E) = 5


probability of getting black balls, P(E) =


Hence, probability of getting black balls = 1 – P(E) = 1 –


(iv) number of events of getting a red or white ball, n(E) = 10



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