Q9 of 11 Page 215

A bag contains 5 red and 3 white balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is

(i) a white ball?


(ii) not a white ball?

(i) The no. of white balls = 3


The no. of total balls in bag = 8


⇒ Probability (Getting a white ball)


=


⇒


(ii) Not a white ball or red ball


⇒ The no. of red balls = 5


The no. of total balls in bag = 8


⇒ Probability (Getting not a white ball)


=


=


More from this chapter

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7

Two unbiased coins are tossed simultaneously. Find the probability of getting at most one tail.

 8

A dice is tossed twice, what is the probability of getting the sum as (i) 9 (ii) 13.

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12 defective pens are accidentally mixed with 132 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.

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One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting.

(i) a jack of red colour.


(ii) a red card


(iii) an ace of hearts.


(iv) the Queen of diamonds.


(v) a spade