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July 16th, 2015, 04:01 PM   #1
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How do I work this out?

Hi, my partner is due to take a Maths test shortly and has been going through some preactice papers. There are a few calculations we are unsure of and would greatly appreciate any support.

The first calculation is (the numbers are wrote as fractions but I couldnt format it correctly on this post)

In a mathematics exam 3/4 of the total marks come from a written paper and 1/4 of the marks from coursework.

In the written paper 14 of the marks come from a mental test.

What fraction of the total marks come from the mental test?

Many thanks
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July 16th, 2015, 05:09 PM   #2
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Sorry, I made a mistake in the last line of the question, it should read -

In a mathematics exam 3/4 of the total marks come from a written paper and 1/4 of the marks from coursework.

In the written paper 1/4 of the marks come from a mental test.

What fraction of the total marks come from the mental test?
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July 16th, 2015, 05:46 PM   #3
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Quote:
Originally Posted by Aarron View Post
Sorry, I made a mistake in the last line of the question, it should read -

In a mathematics exam 3/4 of the total marks come from a written paper and 1/4 of the marks from coursework.

In the written paper 1/4 of the marks come from a mental test.

What fraction of the total marks come from the mental test?
1/4 of 3/4 ... what now?
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July 16th, 2015, 06:00 PM   #4
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Quote:
Originally Posted by skeeter View Post
1/4 of 3/4 ... what now?
Apologies, the formatting wasnt great, Ive attached a pic of the test paper question. Thanks
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File Type: jpg question.jpg (19.6 KB, 5 views)
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July 17th, 2015, 03:06 AM   #5
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Since the written test is $\displaystyle \frac{3}{4}$ of the total mark and the mental test is $\displaystyle \frac{1}{4}$ of the written test, the mental test represents $\displaystyle \frac{1}{4}$ of that $\displaystyle \frac{3}{4}$ contribution to the total mark.

i.e. we need to calculate $\displaystyle \frac{1}{4}$ of $\displaystyle \frac{3}{4}$

"Of" means "Times" (Remember this). So we need to calculate $\displaystyle \frac{1}{4} \times \frac{3}{4}$:
$\displaystyle \frac{1}{4} \times \frac{3}{4}$
$\displaystyle =\frac{1\times 3}{4 \times 4}$
$\displaystyle =\frac{3}{16}$

The mental test represents $\displaystyle \frac{3}{16}$ of the total mark.
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July 20th, 2015, 09:01 PM   #6
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Thanks that you edited the question.I was surprised by the first one that is would be impossible to find out the fraction as many solution will exist.
For the edited part.
the mental test will have 1/4*3/4 of total marks ie. 3/16, for example if total marks is 16 3 marks will be for mental test, 12 for written work and 4 for coursework, 9 marks for non mental written work(i don't know what type of work would be non mental but written !)
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