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## #1 2006-05-07 06:30:26

amit
Guest

### probability question

you thraw 1 dice until you get K times the number '6'
X = the number of your thraws.
what is P(X) ?

## #2 2006-05-07 07:35:20

Patrick
Real Member

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### Re: probability question

Are you looking for the probability to get 6? I don't quite get the question..

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## #3 2006-05-07 19:44:00

George,Y
Super Member

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### Re: probability question

When X is less than K, the probability is 0,
Else Binomial distribution would be the answer.

for a single experiment,
P(dice showing 6)=1/6
P(dice not showing 6)=5/6

X'(y-Xβ)=0

## #4 2006-05-07 20:50:40

mathsyperson
Moderator

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### Re: probability question

George, Y is right. If X is not an integer or is less than K, then the answer is 0.

Otherwise, it would be XCK * (1/6)k * (5/6)(X-K)

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