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# Maths GCSE Histograms watch

1. The histogram represents the ages of the members of a golf club.
There are 44 members who are aged 30.
Calculate the number of members who are aged 55 or over.
I know there is no picture of the histogram as it is on paper, but how would I go about this question. I've been trying everything and cannot figure out what to do as the scaling of the histogram itself makes no sense.
2. You have to include a picture of the histogram to have any chance of an answer but the following will help.

Histograms use area to represent data and so use the 44 members under 30 (I am sure that you typed this bit wrong!) to work out the number of members represented by each small square on the graph.

Now go to the bar containing 55. Count the number of squares in that bar and multiply up to see how many members are in whatever range the whole bar represents.

Look at where 55 lies within the bar and divide the number of people appropriately.

e.g if the bar was 45 to 60 and represented 90 members. The 55 and over but will be one third of the number represented by the bar because 55 is 2/3 of the way from 45 to 60.

Finally, add on the total number of squares (and hence people) for the other ages above the bar containing 55.
3. (Original post by nerak99)
You have to include a picture of the histogram to have any chance of an answer but the following will help.

Histograms use area to represent data and so use the 44 members under 30 (I am sure that you typed this bit wrong!) to work out the number of members represented by each small square on the graph.

Now go to the bar containing 55. Count the number of squares in that bar and multiply up to see how many members are in whatever range the whole bar represents.

Look at where 55 lies within the bar and divide the number of people appropriately.

e.g if the bar was 45 to 60 and represented 90 members. The 55 and over but will be one third of the number represented by the bar because 55 is 2/3 of the way from 45 to 60.

Finally, add on the total number of squares (a nd hence people) for the other ages above the bar containing 55.
here is a pretty bad, but usable image of the histogram.
Attached Images

4. (Original post by Grace40)
The histogram represents the ages of the members of a golf club.
There are 44 members who are aged 30.
Calculate the number of members who are aged 55 or over.
I know there is no picture of the histogram as it is on paper, but how would I go about this question. I've been trying everything and cannot figure out what to do as the scaling of the histogram itself makes no sense.
Frequency=Frequency density x class width
5. Well everything I said before still stands except the range 50-60 has 55 half way. So half the people in that bar are over 55.

The total,area under 30 represents 44. Assuming your question wording is still wrong.

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Updated: March 20, 2016
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