Q. 75.0( 2 Votes )

A bag contains 3 red balls, 5 black balls and 4 white balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is :

(i) White?

(ii) red?

(iii) black?

(iv) not red?

Answer :

(i) White?


Total numbers of red balls = 3


Number of black balls = 5


Number of white balls = 4


Total number of balls = 3 + 5 + 4 = 12


Probability of getting a white ball is =


(ii) red?


Total numbers of red balls = 3


Number of black balls = 5


Number of white balls = 4


Total number of balls = 3 + 5 + 4 = 12


Probability of getting a red ball is =


(iii) black?


Total numbers of red balls = 3


Number of black balls = 5


Number of white balls = 4


Total number of balls = 3 + 5 + 4 = 12


Probability of getting a black ball is =


(iv) not red?


Total numbers of red balls = 3


Number of black balls = 5


Number of white balls = 4


Total number of Non red balls = 5 + 4 = 9


Probability of getting a non red ball is =


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