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an unbiased die is thrown what is the probability of getting an even number and multiple of 3 2nd a number between 3 and 6 |
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Answer» Answer: In a single throw of an unbiased dice, you can get any ONE of the OUTCOMES: 1, 2, 3, 4, 5, or 6. So, exhaustive number of cases = 6. (i) An even number is OBTAINED if you obtain any one of 2, 4, 6 as an outcome. So, favourable number of cases = 3. Thus, required probability = 3/6 = 1/2 (ii) A multiple of 3 is obtained if you obtain any one of 3, 6 as an outcome. So, favourable number of cases = 2 Thus, required probability = 2/6 = 1/3 (iii) An even number or a multiple of 3 is obtained in any of the following outcomes 2, 3, 4, 6. So, favourable number of cases = 4. Thus, required probability = 4/6 = 2/3 (iv) An even number and a multiple of 3 is obtained if you get 6 as an outcome. So, favourable number of cases = 1. Thus, required probability = 1/6 |
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