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