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A class has 30 students. The mean height of the 14 boys is 1.52m. The mean height of all the students is 1.48m. Work out the mean height of the girls.

The mean height of all the students is 1.48m which means that the total height of all the students is 30 * 1.48m = 44.4m. The contribution due to the boys is 14 * 1.52m = 21.28m. Therefore the total height o...
WD
Answered by William D. • Maths tutor
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How do you answer secondary source questions (Paper 1) at A Level?

There are several ways to approach source questions, but the most effective way is to give an overall summary of the source followed by an analysis of 3 points the source makes. 1) Read the source and DO NOT...
ST
Answered by Sam T. • History tutor
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Rearrange 2s = d/t to make t the subject.

2s = d/t. Multiply both sides of the equation by t to give 2ts = d. Then, divide both sides of the equation by 2s to give t = d/2s.
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Answered by Prasanth P. • Maths tutor
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Explain the socio-economic consequences of population movements for source countries across Europe.

An adverse socio-economic consequence of population movements for source countries across Europe is the brain drain. The brain drain is a geographical term which is used to explain the socio-economic phenome...
AM
Answered by Antonia M. • Geography tutor
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How do I analyse a child’s written language development instead of spoken development because I can’t analyse things like phonology or conversational features?

When analysing a child’s piece of writing there are certain things to look out for that we don’t use when analysing speech. For example, we can study orthography (the spelling of words), graphemes (letters o...
FA
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