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Exactly. Is this a case of - say whatever one you want as long as you can back it up. I suppose one thing that is worth asking - how many marks is this question worth in relation to the others? if it is a lot more then they may be after a number of factors being determined before coming to a...

My wife had to resit her maths a few years ago. Big bit of advice I gave her that helped is always ignore the bloody story. It is there to throw you off half the time. Once you stop thinking of swimming and such crap then it's a simple case of getting the mean. Also, in this case you could...