Question 12:
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 the given figure), 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?
Answer:
Total number of possible outcomes = 8
(iii) The numbers greater than 2 are 3, 4, 5, 6, 7, and 8.
Therefore, total numbers greater than 2 = 6
(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 = 8/8 = 1
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