You are Here: Home >< Maths

# S2 sampling: how to know if I listed all samples? Any rules? Watch

1. For example how do i know if the number of possible samples in this question is 8?
2. Anyone know this?
3. Work through it systematically, e.g.
(1,1,1)
(2,1,1), (1,2,1), (1,1,2)
(1,2,2), (2,1,2), (2,2,1)
(2,2,2)

The only way really
4. The sample of size 3 is there are 2 possible options for two possible options for and two possible options for , so the number of possible samples is
5. (Original post by NotNotBatman)
The sample of size 3 is there are 2 possible options for two possible options for and two possible options for , so the number of possible samples is
Thanks a lot!
6. You can also check that the probabilities add to 1 at the end.

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: June 26, 2016
Today on TSR

### Falling in love with him

But we haven't even met!

### Top study tips for over the Christmas holidays

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.