23. Five mark exercise problems VI

A bag contains $5$ red balls, $6$ white balls, $7$ green balls, $8$ black balls. One ball is drawn at random from the bag. Find the probability that the ball drawn is:

 

(i) White $=$ $\frac{i}{i}$

 

(ii) Black or red $=$ $\frac{i}{i}$

 

(iii) Not white $=$ $\frac{i}{i}$

 

(iv) Neither white nor black $=$ $\frac{i}{i}$