Question

A bag contains 6 red, 5 black, and 4 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is (1)white(2)red(3)not black(4)red or white

Answer 1

bag contains 6 red, 5 black, and 4 white balls
Total balls =6 + 5 + 4
=15

1) probability that the ball drawn is white = no. Of white balls / total balls
= 4 /15

2)probability that the ball drawn is red= 6/15
= 3/5

3) probability that the ball drawn is not black = no. Of red balls + no. Of white balls / total Balls

= 6+4/15
= 10/15
= 2 /3

4)
probability that the ball drawn is red or white =
No. Of red balls +no. Of white balls
=6+4/15=10/15=2/3