Hi,(adsbygoogle = window.adsbygoogle || []).push({});

I have never quite worked this type of probability question out, so would like some help please.

Imagine this scenario:

There are 4 people sat around a table, A, B, C and D.

A is sitting opposite C, B is sitting opposite D.

There is a bag with 16 balls numbered 1-16.

The balls are randomly drawn so that each person has 4 balls.

Imagine you are A.

And the balls you have are 1,4,5,9.

Now you want to work out what is the probability that C has a ball that is higher than your highest ball i.e. you want to work out whether C has AT LEAST one of 10,11,12,13,14,15, or 16.

Now the way I look at it is that the:

probability of C having ball 10 is 1/3

probability of C having ball 11 is 1/3

probability of C having ball 12 is 1/3

probability of C having ball 13 is 1/3

probability of C having ball 14 is 1/3

probability of C having ball 15 is 1/3

probability of C having ball 16 is 1/3

But I just don't know what to do next. Any assistance would be appreciated.

Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Probability question - hypergeometric distribution?

**Physics Forums | Science Articles, Homework Help, Discussion**