Mathematics (AS & A Level) · Oct / Nov 2023 · Paper 61 · Question 4

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 ∼N 10.3, 5.76 and Y ∼N 11.4, 9.61 . The income generated by the chemicals is $2.50 per kilogram for A and $3.25 per kilogram for B.

Read automatically from the paper; the printed page above is exact.