Hey there! Sign in to join this conversationNew here? Join for free
 You are Here: Home >< Maths

# Statistics Binomial Distribution question help.. Watch

1. Could you please help me with this question and it's worth 4 marks.. :'O

link

http://filestore.aqa.org.uk/subjects...W-QP-JUN10.PDF

QUESTION 4 (c)

thank you for for ur help guys.
2. (Original post by Jacksgap)
Could you please help me with this question and it's worth 4 marks.. :'O

link

http://filestore.aqa.org.uk/subjects...W-QP-JUN10.PDF

QUESTION 4 (c)

thank you for for ur help guys.
For a binomial distribution:
You know the probabilities, you just need to find out how many people there are.
3. 2000 x 52% =1040

1040 x 15% = 156 males

2000-1040 =960

960x 11% = 105.6
=106 females

156+106 = 262

thats what i would do but cheack the mark sceme
4. What is the probability that a random person is male and left-handed? What is the probability that they are female and left-handed? Thus, what is the probability that a random person is left-handed (i.e. that they are either female and left-handed or male and left-handed)?

Remember the expected value of a binomial distribution is n*p, where n is the number of "trials" and p is the probability of a trial "succeeding".
5. i GET IT NOW THANK YOU.

Reply
Submit reply
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: May 15, 2013
Today on TSR

### Medicine offers rolling in

Which unis have sent theirs?

### I refused to be served by tattooed cashier

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

## 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
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.