Question Help

[MrBrillsbury]

Sarah has a biased die. When it is rolled, the probability of obtaining a particular outcome (X) is shown in the following table:
x           |  1   |   2  |   3  |  4  |   5  | 6
Pr(X=x) | 0.1 | 0.2 | 0.3 | 0.2 | 0.1 | p

What is the probability that, given that the sum of the rolls is a six, one of the rolls is a three?

[Sine]

Sarah has a biased die. When it is rolled, the probability of obtaining a particular outcome (X) is shown in the following table:
x           |  1   |   2  |   3  |  4  |   5  | 6
Pr(X=x) | 0.1 | 0.2 | 0.3 | 0.2 | 0.1 | p

What is the probability that, given that the sum of the rolls is a six, one of the rolls is a three?

sum of the probabilities must be 1 so first you should find p
It doesn't say how many rolls but I'll assume 2
Now what we basically need is Pr(one of the rolls is a 3 | sum of the rolls is a six)
This should look familiar now? Hope this helps