7. Two mark example problem I

A bag contains \(5\) blue balls and \(4\) green balls. A ball is drawn at random from the bag. Find the probability that the ball drawn is (i) blue (ii) not blue.

 

Answer:

 

The probability that the ball drawn is blue \(=\) $\frac{i}{i}$

 

The probability that the ball drawn is not blue \(=\) $\frac{i}{i}$