Question

A bag contains 7 red, 5 white and 6 black balls. A ball is drawn from the bag at random. Find the

probability that the ball drawn is not black.​

Answer 1

Ways in which one ball can be drawn = ¹⁸C1

Now,ways in which only red and white is drawn ⇒ ⁷C1 + ⁵C1

So probability = 7+5/18

= 12/18

= 2/3 Ans