Question

There are 20 balls in a bag made up of 5 black 6 white and the rest are green .find the probability that the ball chosen is
1.white 2.not black 3.green

Answer 1

1. Probability of choosing a white ball:
Total number of white balls = 6
Total number of balls = 20

Probability = (Number of white balls / Total number of balls) = 6 / 20 = 3 / 10

2. Probability of choosing a ball that is not black:
Total number of black balls = 5
Total number of balls = 20

Probability = (Number of balls that are not black / Total number of balls) = (20 - 5) / 20 = 15 / 20 = 3 / 4

3. Probability of choosing a green ball:
Total number of green balls = Total number of balls - (Number of black balls + Number of white balls) = 20 - (5 + 6) = 20 - 11 = 9

Probability = (Number of green balls / Total number of balls) = 9 / 20

Therefore, the probability of choosing:
1. A white ball = 3 / 10
2. A ball that is not black = 3 / 4
3. A green ball = 9 / 20