Mathematics (AS & A Level) · Oct / Nov 2017 · Paper 71 · Question 6
9709
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The numbers of barrels of oil, in millions, extracted per day in two oil fields A and B are modelled by the independent random variables X and Y respectively, where X ∼N3.2, 0.42 and Y ∼N4.3, 0.62 . The income generated by the oil from the two fields is $90 per barrel for A and $95 per barrel for B.
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6(i)[3]
6(ii)[5]
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