Q8 of 31 Page 308

A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag.

What is the probability that the ball drawn is


(i) Red? (ii) Not red?

(i) Total number of balls in the bag = 8

Probability of the ball drawn to be red. :


=


=


(ii) We know that:


P (E) = 1 - P ()


Hence,


Probability of not getting red ball


= 1 - Probability of getting a red ball


= 1 -


=


More from this chapter

All 31 →
6

A bag contains lemon flavoured candies only. Malini takes out one candy without looking into the bag. What is the probability that she takes out

(i) An orange flavoured candy?


(ii) A lemon flavoured candy?

 7

It is given that in a group of 3 students, the probability of 2 students not having the same birthday is 0.992. What is the probability that the 2 students have the same birthday?

 9

A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be

(i) Red? (ii) White?


(iii) Not green?

 10

A piggy bank contains hundred 50p coins, fifty Re 1 coins, twenty Rs 2 coins and ten Rs 5 coins. If it is equally likely that one of the coins will fall out when the bank is turned upside down, what is the probability that the coin

(i) Will be a 50 p coin?


(ii) Will not be a Rs 5 coin?