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    Anyone able to explain this to me but wiped ting it step by step. I undersaptajd the first bit; it's fairly simple however 6b I can't work out at all and explanations about 6c would be great. The mark scheme gives me a vague understanding but I have no idea how to calculate 6b. Really struggled on this question, a couple of stupid errors and got 1/11; if I can learn this I would be doing a lot better.

    http://filestore.aqa.org.uk/subjects...1-QP-JAN13.PDF

    Thanks ������
 
 
 
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Updated: May 16, 2015

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