Mathematics (AS & A Level) · Oct / Nov 2023 · Paper 63 · Question 4
9709
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The masses, in kilograms, of chemicals A and B produced per day by a factory are modelled by the independent random variables X and Y respectively, where X ∼N10.3, 5.76 and Y ∼N11.4, 9.61 . The income generated by the chemicals is $2.50 per kilogram for A and $3.25 per kilogram for B.
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4(a)[2]
4(b)[6]
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