Question

a bag contains 9red balls and 3 black balls. two ball is drawn at random from the bag. what is the probability that the ball drawn is 1)black 2)black and red​

Answer 1

Please find the attachment

Answer 2

Answer:

Step-by-step explanation:

1) p(black balls)=3c2/12c2

=3*2/12*11

=1/22

2)p(1 black&1 red)=3c1*9c1/12c2

=3*9/12*11

=9/22

hope this may help u.........