Mathematics (AS & A Level) · Oct / Nov 2018 · Paper 72 · Question 3
9709
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Sugar and flour for making cakes are measured in cups. The mass, in grams, of one cup of sugar has the distribution N250, 10 . The mass, in grams, of one cup of flour has the independent distribution N160, 9 . Each cake contains 2 cups of sugar and 5 cups of flour. Find the probability that the total mass of sugar and flour in one cake exceeds 1310 grams. [5]
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