A-LevelMathematicsProbability and statisticsMay/June 2025Paper 6 Q54 Marks
In Urberia, the masses, in kilograms, of men have the distribution N(70.3, 5.9²). A certain footbridge in Urberia can take a maximum safe load of 1500kg. When n men stand on the bridge, the probability that the bridge is unsafe is less than 0.01. Stating a necessary assumption, find the maximum value of n.
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