Question

A bag contains 7 red, 5 white and 3 black balls. A ball is
thrown at random from the bag. Find the probability that
the ball thrown is neither white nor black.​

Answer 1

no. of favourable outcomes are 8

total outcomes are 15

probability =8/15

Answer 2

Answer:

1/2

Step-by-step explanation:

Total no of balls = total no of outcomes = 5+7+4+ 2 = 18

Now,

One ball is drawn according to the question

1. P(white or blue) = 5+4/ 18 => 9/18 => 1/2

2.P(red or black) = 7+4/18 => 11/ 18

3. P(not white) = 7+ 4+2/18 => 13/18

4. P(neither white nor black) = 7+ 2/18 = > 9/18 = > ½.