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Post by Flying Monkeys on Apr 10, 2020 10:04:46 GMT
Me too. Didn't get up till 9:50. Anyway, it should be very easy now. If I roll it once, what's the probability of not getting a 6?
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Post by yggdrasil on Apr 10, 2020 10:13:43 GMT
Rolling a single die, the probability that it does not show a 6 is 5/6. So rolling three dices, the probability for no 6 is (5/6)3, and therefore the probability for at least one 6 is 1−(56)3=91216, if my thinking is correct.
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Post by Flying Monkeys on Apr 10, 2020 10:45:01 GMT
Rolling a single die, the probability that it does not show a 6 is 5/6. So rolling three dices, the probability for no 6 is (5/6)3, and therefore the probability for at least one 6 is 1−(56)3=91216, if my thinking is correct. 91216? What's that?
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Post by yggdrasil on Apr 10, 2020 12:04:12 GMT
Rolling a single die, the probability that it does not show a 6 is 5/6. So rolling three dices, the probability for no 6 is (5/6)3, and therefore the probability for at least one 6 is 1−(56)3=91216, if my thinking is correct. 91216? What's that? Fuck knows, nicked it off the web.
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Post by Flying Monkeys on Apr 10, 2020 12:07:43 GMT
Fuck knows, nicked it off the web. I'm sure your computertron will have a calculator.
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Post by Flying Monkeys on Apr 12, 2020 13:42:00 GMT
Ha ha ha, still too difficult for @hux.
Blah blah blah EDUCATION blah blah blah.
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Post by kls on Apr 16, 2020 9:17:18 GMT
I wanted to say 1/2 (as in 1/6+1/6+1/6=3/6), but that can't be right. If we went with rolling 6 times by that method that would give 6/6 or 1 and that has to be wrong as that would make it a certainty.
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Post by kls on Apr 16, 2020 9:28:46 GMT
Fuck knows, nicked it off the web. 216-125 is 91 I think it's getting at a fraction-91/216?
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Post by Flying Monkeys on Apr 16, 2020 21:18:54 GMT
216-125 is 91 I think it's getting at a fraction-91/216? It can be worked out as a fraction and 216 does come into it.
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Post by Flying Monkeys on Apr 23, 2020 7:14:13 GMT
Solution:
Prob of rolling at least 1 six = 1 - Prob of rolling no sixes = 1 - 5/6*5/6*5/6 = 0.4213 or 42.13% Easy, really. In fractions, 1 - 5/6*5/6*5/6 = 216/216 - 125/216 = 91/216. So yggdrasil got the right method but couldn't get the final answer and kls got the right calculation ("216-125 is 91") but seems to have been prompted by Yggdrasil and we don't allow collaboration round these parts. Or you can do it the long way:
Prob of rolling at least 1 six = Prob of rolling 1 six + Prob of rolling 2 sixes + Prob of rolling 3 sixes = (1/6*5/6*5/6 + 5/6*1/6*5/6 + 5/6*5/6*1/6) + (1/6*1/6*5/6 + 1/6*5/6*1/6 + 5/6*1/6*1/6) + 1/6*1/6*1/6 = 75/216 + 15/216 + 1/216 = 91/216 = 0.4213
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