Question

A bag contains 5 red, 5 green and 5 white balls of the same size. A ball is drawn at random from the bag. Is the probability of picking up a ball of any colour equally likely or not? Justify.

Answer 1

Number of red balls = 5 = n(R) 

No. of green balls = 5 = n(G) 

No. of white balls = 5 = n(W) 

Total balls = 15 = T(B) 

Now probability of picking red balls

= P (R) = \(\frac{150}{350}=\frac{15}{35}=\frac{3}{7}\)

= \(\frac{5}{15}=\frac{1}{3}\)

Probability of picking green balls 

= \(\frac{5}{15}=\frac{1}{3}\)

Probability of picking white balls

= \(\frac{5}{15}=\frac{1}{3}\)