so I've got this question:

A die with faces numbered 1 to 6 is biased so that , (r=1,...,6). Find the value of k.

Now my problem is i don't know which numbers it is biased to. supposing that (r=1,...,6) means the numbers from 1 to 6.

Thanks

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- Jan 27th 2010, 11:10 PMarzeI'm missing something
so I've got this question:

A die with faces numbered 1 to 6 is biased so that , (r=1,...,6). Find the value of k.

Now my problem is i don't know which numbers it is biased to. supposing that (r=1,...,6) means the numbers from 1 to 6.

Thanks - Jan 27th 2010, 11:57 PMCaptainBlack
- Jan 28th 2010, 12:12 AMarze
I'm really sorry i don't get it.

- Jan 28th 2010, 12:22 AMCaptainBlack
- Jan 28th 2010, 12:29 AMarze
ok. so i know that r can be any number, and P(any number)=1. and what's next?

P(score is r)=kr=1? - Jan 28th 2010, 02:23 AMCaptainBlack
The sum of the probabilities of all posssible outcomes must be .

So:

Hence .

CB - Jan 28th 2010, 06:42 AMSoroban
Hello, arze!

You have to understand what was given.

Quote:

A die with faces numbered 1 to 6 is biased so that

Find the value of

We are told that the probability of rolling a number is a constant times

So we have these probabilities:

. . . .

The probability thatof the numbers turn up is 100%.*one*

So we have: .

Therefore: .

- Jan 28th 2010, 06:45 AMarze
Thank you! i understand now!