chetan2u wrote:

A bag contains only 3 different colours and atleast one ball of red, white and blue colour. If the number of balls of each colour is distinct and red coloured balls are more than each of the other two colours, what is the probability of picking red ball?

(1) number of blue and white ball is half of total number of ball.

(2) there are 3 red coloured balls.

Hi,

rephrase the stem question to R/(R+W+B) ?

1. it says W+B=(W+B+R)/2 ---> W+B=R put it back in above equetion and it gives 1/2. sufficient

2. if there are 3 red balls and in stem it says the number of balls differ, there are more reds than other two and at least 1 of each exist then either w=1,B=2 or b=1,w=2. therefore sufficient.

have fun.