| Exam Board | OCR |
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| Module | Further Statistics (Further Statistics) |
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| Year | 2018 |
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| Session | September |
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| Topic | Central limit theorem |
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3 A discrete random variable \(X\) has the distribution \(\mathrm { U } ( 11 )\).
The mean of 50 observations of \(X\) is denoted by \(\bar { X }\).
Use an approximate method, which should be justified, to find \(\mathrm { P } ( \bar { X } \leqslant 6.10 )\).