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Math Person Help Needed - Easy Math, If You Know How

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ThomWV Donating Member (1000+ posts) Send PM | Profile | Ignore Fri Nov-11-05 11:00 PM
Original message
Math Person Help Needed - Easy Math, If You Know How
And I don't know how.

What are the odds of three coins being tossed and all three comming up heads?
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Telly Savalas Donating Member (1000+ posts) Send PM | Profile | Ignore Fri Nov-11-05 11:01 PM
Response to Original message
1. 1 in 8
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ThomWV Donating Member (1000+ posts) Send PM | Profile | Ignore Fri Nov-11-05 11:04 PM
Response to Reply #1
2. Thank You!
I appreciate it. Two (possible choices) to the third ... I presume?
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Telly Savalas Donating Member (1000+ posts) Send PM | Profile | Ignore Fri Nov-11-05 11:06 PM
Response to Reply #2
4. Essentially.
To put it crudely: the first coin comes up heads about half the time. Half of the times that happens, the second one comes up heads, and half of the time these two events occur, the third one comes up heads. So (1/2) times (1/2) times (1/2) = 1/8
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aePrime Donating Member (676 posts) Send PM | Profile | Ignore Fri Nov-11-05 11:05 PM
Response to Reply #1
3. Telly's right
There's a 1/2 chance of the first coming up heads. There's a 1/2 chance of the second coming up heads. There's a 1/2 chance of the third coming up heads.

Three independent events, just multiply the probabilities together.

1/2 * 1/2 * 1/2 = 1/8.
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