You are Here: Home >< GCSEs

# Maths

Announcements Posted on
Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
1. How do i find out 75% of a cumulative frequency graph and answer if it is less or more than and prove that my answer is correct?
2. (Original post by EstherFatunla)
How do i find out 75% of a cumulative frequency graph and answer if it is less or more than and prove that my answer is correct?
Your question doesn't make much sense; if you provide a picture of the question it helps people to help you more easily.

Also I'd recommend posting this to the Maths section of study help rather than the GCSE section - you'll get a lot more attention over there,
3. (Original post by TimGB)
Your question doesn't make much sense; if you provide a picture of the question it helps people to help you more easily.

Also I'd recommend posting this to the Maths section of study help rather than the GCSE section - you'll get a lot more attention over there,
Okay thank you I will send a picture now
4. (Original post by TimGB)
Your question doesn't make much sense; if you provide a picture of the question it helps people to help you more easily.

Also I'd recommend posting this to the Maths section of study help rather than the GCSE section - you'll get a lot more attention over there,
Attachment 523439523441
Attached Images

5. Ah, ok. Draw a line up at weight = 3.4. Check where this crosses the graph. If the cumulative frequency at that point is less than 75, then she is wrong. In this case, the cumulative frequency at that point is about 57, suggesting that only 57% of the parcels have weight less than 3.4kg, not the 75% needed for her statement to be correct.

To find the correct answer, draw a line across at cf = 75. The weight at the point where it crosses is about 5.2kg, which suggests that 75% of parcels weigh less than 5.2kg. (Not actually needed for this question, but could be useful in future questions).
6. Attachment 523455523457523460
(Original post by TimGB)
Ah, ok. Draw a line up at weight = 3.4. Check where this crosses the graph. If the cumulative frequency at that point is less than 75, then she is wrong. In this case, the cumulative frequency at that point is about 57, suggesting that only 57% of the parcels have weight less than 3.4kg, not the 75% needed for her statement to be correct.

To find the correct answer, draw a line across at cf = 75. The weight at the point where it crosses is about 5.2kg, which suggests that 75% of parcels weigh less than 5.2kg. (Not actually needed for this question, but could be useful in future questions).
Thank you so much but i have more questions to ask below:
Attachment 523455523457

There are 18 packets of sweets and 12 boxes of sweets in a carton.
The mean number of sweets in all the 30 packets and boxes is 14
The mean number of sweets in all the 18 packets is 10
Work out the mean number of sweets in the boxes
Attached Images

7. (Original post by TimGB)
Ah, ok. Draw a line up at weight = 3.4. Check where this crosses the graph. If the cumulative frequency at that point is less than 75, then she is wrong. In this case, the cumulative frequency at that point is about 57, suggesting that only 57% of the parcels have weight less than 3.4kg, not the 75% needed for her statement to be correct.

To find the correct answer, draw a line across at cf = 75. The weight at the point where it crosses is about 5.2kg, which suggests that 75% of parcels weigh less than 5.2kg. (Not actually needed for this question, but could be useful in future questions).
Thank you so much but i have more questions to ask below:
Attachment 523455523457Attachment 523455523457523460

There are 18 packets of sweets and 12 boxes of sweets in a carton.
The mean number of sweets in all the 30 packets and boxes is 14
The mean number of sweets in all the 18 packets is 10
Work out the mean number of sweets in the boxes
8. (Original post by EstherFatunla)
Thank you so much but i have more questions to ask below:
Attachment 523455523457Attachment 523455523457523460

There are 18 packets of sweets and 12 boxes of sweets in a carton.
The mean number of sweets in all the 30 packets and boxes is 14
The mean number of sweets in all the 18 packets is 10
Work out the mean number of sweets in the boxes
Answer for the first one:
Attached Images

9. (Original post by EstherFatunla)
Thank you so much but i have more questions to ask below:
Attachment 523455523457Attachment 523455523457523460

There are 18 packets of sweets and 12 boxes of sweets in a carton.
The mean number of sweets in all the 30 packets and boxes is 14
The mean number of sweets in all the 18 packets is 10
Work out the mean number of sweets in the boxes
Answer to the second one:
Attached Images

10. (Original post by TimGB)
Answer to the second one:
Thank you

## 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
your full birthday is required
1. Oops, you need to agree to our Ts&Cs to register

Updated: April 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

### Who is getting a uni offer this half term?

Find out which unis are hot off the mark here

Poll
Useful resources

## Study tools

### Essay expert

Learn to write like a pro with our ultimate essay guide.

See where you can apply with our uni match tool

### Ask a question

Chat to other GCSE students and get your study questions answered.

### Make study resources

Create all the resources you need to get the grades.

### Create your own Study Plan

Organise all your homework and exams so you never miss another deadline.

### Resources by subject

From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

### Find past papers

100s of GCSE past papers for all your subjects at your fingertips.

## Help out other students

Can you help? Study help unanswered threads

## Groups associated with this forum:

View associated groups
Study resources

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.