Turn on thread page Beta
 You are Here: Home >< Maths

# Help with this question please... watch

1. This is my working out but I still got 3/4 marks:
(x(x-2))+ x + (2x + 8)
(x² - 2x) + x + (2x + 8)
x² + x + 8 = 50
x² + x = 42
x² + x - 42 = 0
(x-6)(x+7)=0
x = 6
P = 20/60
2. basically (x(x-2)) + x + (2x+8) + 10 = 60
Rearrange it to work out X
Once you've done that X/60 is the probability the painting is from the 20th Century and British
3. (Original post by stressed year 11)
...
This is conditional probability. You are looking for

Before jumping into that, you might wish to determine what is first.
4. (Original post by lostplot)
Once you've done that X/60 is the probability the painting is from the 20th Century and British
Not quite the answer to the question.
5. Your working for x is correct. Now it is asking you to look at the portion of T and which part of it belongs to B. So in this scenario you are looking for
Spoiler:
Show
x/x(x-2) + x

Spoiler:
Show
sub your x value in
Posted on the TSR App. Download from Apple or Google Play

Reply
Submit reply
Turn on thread page Beta

### Related university courses

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: February 20, 2018
The home of Results and Clearing

### 3,448

people online now

### 1,567,000

students helped last year
Today on TSR

### A-level grade boundaries

Hang on, have Edexcel's come out already?

### University open days

1. SAE Institute
Animation, Audio, Film, Games, Music, Business, Web Further education
Thu, 16 Aug '18
2. Bournemouth University
Clearing Open Day Undergraduate
Fri, 17 Aug '18
3. University of Bolton
Undergraduate Open Day Undergraduate
Fri, 17 Aug '18
Poll
Useful resources

## Make your revision easier

### 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

Can you help? Study help unanswered threads

## Groups associated with this forum:

View associated groups

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

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