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State a necessary assumption, then find the maximum value of $n$.
Mathematics 9709 · AS & A Level · Linear combinations of random variables
Linear combinations of random variables — practice question
In Urberia, the masses of men, in kilograms, are distributed as $N(70.3, 5.9^2)$. A particular footbridge in Urberia has a maximum safe load of 1500 kg. If $n$ men are on the bridge, the chance that it is unsafe is below 0.01.
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