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5 coins are tossed. If two of them show heads, then the

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Senior Manager
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5 coins are tossed. If two of them show heads, then the [#permalink] New post 23 Jun 2006, 15:42
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5 coins are tossed. If two of them show heads, then the probability that all 5 coins show head is

a. 1/32 b. 1/10 c. 1/26 d. 1/13
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 [#permalink] New post 23 Jun 2006, 19:11
A

No. coins---Possible outcomes
2---------------------4
3---------------------8
4---------------------16
5-----------------32

Only one possible outcome will result in all heads.

So probability is 1/32 ? :?:
_________________

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  [#permalink] 23 Jun 2006, 19:11
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5 coins are tossed. If two of them show heads, then the

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