2009 JJC P2
2009 JJC P2
Prelims
In a large canteen, a quarter of the customers drink coffee.
- Find the probability that at least \(3\) out of a random sample of \(7\) customers drink coffee.
- If the probability that fewer than \(k\) out of a random sample of \(500\) customers drink coffee is at least \(0.99\), find the lease value of \(k\).
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Answer:(a) 0.244 (b) 149
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