You are Here: Home >< Maths

# Probability Help ( 2 Fair dice)

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. Can someone explain why the probability of rolling 2 fair dice and getting a Probability of getting total 10 and getting for on green is 3/36?
Can someone explain why the probability of rolling 2 fair dice and getting a Probability of getting total 10 and getting for on green is 3/36?
Where does the green come in to all of this? But imagine it like this. There are trivially two ways of making and they are .

Now on a fair dice the probability of getting any one number is .
10 can be made in the following ways:
6+4=10
4+6=10
5+5=10
Each way has probability
And as there are three potential ways of doing this the total probability of getting a 10 is
3. (Original post by Cryptokyo)
Where does the green come in to all of this? But imagine it like this. There are trivially two ways of making and they are .

Now on a fair dice the probability of getting any one number is .
10 can be made in the following ways:
6+4=10
4+6=10
5+5=10
Each way has probability
And as there are three potetial ways of doing this the total probability of getting a 10 is
There are 2 dices green and red. Sorry, its my fault I haven't worded the question out properly. I am confused about the part in the screenshot below. I don't see how the probability becomes 3/36

There are 2 dices green and red. Sorry, its my fault I haven't worded the question out properly. I am confused about the part in the screenshot below. I don't see how the probability becomes 3/36

I believe their answer is incorrect as the condition is P(total 10 and 4 on green) would yield a probability of as the events are independent. And 6 is the only number that can give a total of ten. This would imply the equation should be:

I believe it should be and not in the equation.

Could you send me a link to the document so I can double check this though.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: October 17, 2016
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:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams