Question

A bag contain 6 red and 5 green identical balls.

Two ball are draw at random one after the

other without replacement. What is the

probability that both balls are of the same

colour​

Answer 1

3/11

2/11

Explanation:

Answer 2

3/11 for two red balls

2/11 for two green balls

Explanation:

6 red and 5 green balls

• first ball - red= 6/11, green= 5/11

• second red ball- 5/10=1/2, second green ball- 4/10= 2/5

• Two red balls = 6/11*1/2= 3/11

• Two green balls= 5/11*2/5= 2/11