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A game of chance consists of spinning an arrow on a circular board, divided into 8 equal parts, which comes to rest pointing at one of the numbers 1, 2, 3, ..,8, which are equally likely outcomes. What is the probability that the arrow will point at (i) an odd number (ii) a number greater than 3 (iii) a number less than 9. |
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Answer» (i) Favourable outcomes are 1, 3, 5, 7 i.e. outcomes. P(an odd number) = 4/8 or 1/2 (ii) Favourable outcomes are 4, 5, 6, 7, 8, i.e., 5 outcomes P(a number greater than 3) = 5/8 (iii) Favourable outcomes are 1, 2, 3.....,8 P(a number less than 9) = 8/8 = 1 |
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