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If you throw a dice 6 times, what's the probability that

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If you throw a dice 6 times, what's the probability that [#permalink] New post 02 Jul 2004, 06:59
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If you throw a dice 6 times, what's the probability that you'd get a six on:
a: exactly one of the die.
b: one or more of the die.
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 [#permalink] New post 02 Jul 2004, 07:40
1. Getting 6 in one die from 6 throws

C(6,1) * (1/6)^1 * (5/6)^5


2. Getting 6 in one or more die from 6 throws

1 - P(Not getting 6 in all six throws from 6 dies)
Ans = 1- (5/6)^6
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 [#permalink] New post 02 Jul 2004, 07:52
sathya76 wrote:
1. Getting 6 in one die from 6 throws

C(6,1) * (1/6)^1 * (5/6)^5


2. Getting 6 in one or more die from 6 throws

1 - P(Not getting 6 in all six throws from 6 dies)
Ans = 1- (5/6)^6


agree with the answers. I presume the question relates to a single die being thrown, b/c if it's for 2 dice, the answer would change to:
1. 12C1 * 1/6*(5/6)^11
2. 1 - (5/6)^12
  [#permalink] 02 Jul 2004, 07:52
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