A bag contains n identical red balls , 2n identical black balls & 3n identical white balls .

If probability of drawing n balls of same colour is equal to 1/6 , then minimum no of red balls in the bag is equal to ?

Hello student,
please find the answer to your question below
From the given data
The requires probability is given by
(3)/(n+2c₂)1/6
By substitution we find that n=5 is the smallest integer which makes this solution possible
Soprobability of drawing n balls of same colour is equal to 1/6 , then minimum no of red balls in the bag is equal to 5