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GCSE Maths question help (Histograms) watch

1. Can someone help me on this question please? like walk through it, because the mark scheme doesn't help at all. In all the worked solutions I've seen, the areas are found out using random numbers? I don't have a clue what to do. Thanks.

(These are the solutions I'm talking about, Idk where the numbers are coming from)

Question 8 on these:
http://homework.m34maths.com/files/d...-Solutions.pdf
2. (Original post by THEgurlxo)

Can someone help me on this question please? like walk through it, because the mark scheme doesn't help at all. In all the worked solutions I've seen, the areas are found out using random numbers? I don't have a clue what to do. Thanks.

(These are the solutions I'm talking about, Idk where the numbers are coming from)

Question 8 on these:
http://homework.m34maths.com/files/d...-Solutions.pdf
Frequency on a histogram is the area. The median is at halfway point of the frequency so you need to first find the total area then divide it by 2. Then you need to find how far along the x-axis you need to go to get this half area.

This is often a hard topic for GCSE students. If you still need help tomorrow then let us know and it can be explained to you in more detail.
3. I still dont understand. How can i work out the area if there are no numbers on the vertical axis?
4. frequency density= frequency/class width
5. i still dont get it, there's only one set of numbers
6. (Original post by THEgurlxo)
I still dont understand. How can i work out the area if there are no numbers on the vertical axis?
You can count the squares and use that as your scale. You don't need to find the actual frequency (that is impossible because of no scale on the y-axis as you said) but you need to find where half the area lies. And this can be done whatever the scale on the y-axis is.
7. (Original post by THEgurlxo)
I still dont understand. How can i work out the area if there are no numbers on the vertical axis?
They normally give you a table with data and make you work the y axis out
8. (Original post by N/A IS THE NAME)
They normally give you a table with data and make you work the y axis out
You don't need that to work out the median and this question is an example of that.

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