Question

9. A bag contains 5 red, 10 black and 15 green balls. A ball is taken out at random. Find
the probability that the ball taken out is:
a. a red ball b. a black ball c. not a black ball d. not a green ball.​

Answer 1

Answer:

a) no. of red balls= 5

   total no. of balls= 5+10+15=30

   Probability of red ball=5/30=1/6

b) no. of black balls=10

   Total no. of balls= 30

   Probability of black ball=10/30=1/3

c) no. of not black balls= no. of red+no.of green balls=5+15=20

   Probability of not black ball=20/30=2/3

d) not green balls=no. of red+no. of black=5+10=15

    Probability of not green balls=15/30=1/2

Step-by-step explanation: