Question

a bag contains 4 red balls 5 black balls and 3 green balls aball is drawn at random from bag find the probability that the ball drawn is a black ball​

Answer 1

Step-by-step explanation:

n(s) = 4+5+3 = 12

n(BB) = 5

P = n(BB)/n(s)

= 5/12

Answer 2

Answer:

= blackball=5

4redball+5blackball+3greenball=12

=5upon12