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Question
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 and these are equally likely outcomes. Find the probability that the arrow will point at any factor of 8.
Solution
Total number of outcomes = 8
Let E be the event that the arrow will point at any factor of 8. So, the outcomes in favour of the event E are 1, 2, 4 and 8.
Total number of favourable outcomes = 4
Thus, the probability that the arrow will point at any factor of 8 is
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