A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8 (see Fig. 15.5), and these are equally likely outcomes. What is the probability that it will point at
(i) 8?
(ii) An odd number?
(iii) A number greater than 2?
(iv) A number less than 9?
Total number of possible outcomes = 8
(i) Probability of getting 8 = 
= 
(ii) Total number of odd numbers on spinner = 4
Probability of getting odd number
= 
= 
= 
(iii) The numbers greater than 2 are 3, 4, 5, 6, 7, and 8
Therefore, total numbers greater than 2 = 6
Probability = 
= 
= 
(iv) The numbers less than 9 are 1, 2, 3, 4, 6, 7, and 8
Therefore, total numbers less than 9 = 8
Probability of getting a number less than 9 = 
= 1
20