Mathematics (AS & A Level) · May / June 2025 · Paper 61 · Question 1
9709
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It is known that 1% of houses in a certain area have a wind turbine. A random sample of 400 houses in this area is chosen for a survey on domestic heating. The number of houses in the sample that have a wind turbine is denoted by X. Use a suitable approximating distribution to find ( ) X 3 P G . [3]
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