Question

A box contains 3 red balls,7 black balls,5 green balls.one ball is drawn from the box at random.find the probability of drawing a:(a)green ball (b)black or red ball (c) ball that is not black

Answer 1

probability of green ball is 5/15
probability of red or black ball is 10/15
probability of ball that is not black is 8/15

Answer 2

Ans=total nu. Of ball=15

Probability of green ball=5

P(E)=n(E)

n(s) = 5÷15=1_

3

Probability of black or red ball=3+7=10balls

P(e) =n(e)

n(s)=10

15=2

3.

Probability of ball that is not black=5green+3red ball= 8 ball.

P(e)=n(e)

n(s)=8

15=8

15ans.