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d2jsp Forums > Off-Topic > General Chat > Homework Help > Probability: Flip 2 Coins, Roll 1 Die, Find Omega > Find Sample Size
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Oct 4 2017 02:20am
flip 2 coins and roll a die

am I incorrect to think there are n(Ω) = 24?

/edit

omega = Ω = sample space = S

woops in title the question should be "find sample SPACE" not size

This post was edited by Regargar on Oct 4 2017 02:22am
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Oct 4 2017 11:11am
24 is the correct number of outcomes if it is a 6-sided die.

If it wants the sample space detailed, you can always write out the genericized version to save space.

S = {(c1, c2, d) | c € {H, T}, d € {1, 2, 3, 4, 5, 6}}


Sorry for the notation. c1 and c2 should be subscripts. The Euro sign is meant to stand in for "is an element of". I don't have the epsilon handy on this phone keyboard.



This post was edited by timmayX on Oct 4 2017 11:20am
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Oct 4 2017 04:31pm
Quote (timmayX @ Oct 4 2017 09:11am)
24 is the correct number of outcomes if it is a 6-sided die.

If it wants the sample space detailed, you can always write out the genericized version to save space.

S = {(c1, c2, d) | c € {H, T}, d € {1, 2, 3, 4, 5, 6}}


Sorry for the notation. c1 and c2 should be subscripts. The Euro sign is meant to stand in for "is an element of". I don't have the epsilon handy on this phone keyboard.


Thanks man I will ask my ta about this also
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Oct 5 2017 08:22am
If you're not wanting to use notation (though the above posted is VERY useful set theory) you can get comfortable with the idea like this.

Imagine all possible outcomes. Ignoring the die roll:

HH, HT, TT, TH

Now we can easily imagine that after any of these 4 events you may roll a number 1 through 6 which would allow 6 possible distinct events after each of these 4. 4 events each with 6 possible endings.

4 x 6 =24
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Oct 17 2017 08:28pm
2x2x6, assuming permutation (order matters)
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Oct 17 2017 10:52pm
Might be mistaken in your desired answer, but would heads, tails, # be the same as tails, heads, #?

This variant consideration would generate results biased towards groups containing one heads and one tails.

End result would be 2 groups of 6 being as probable as the one group of 12... I am too tired to convert this to function form, bit I think you will see where I am going.
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