In Blackbury it is known that 0.4% of people have blood group AB. Blackbury High School has
Question:
In Blackbury it is known that 0.4% of people have blood group AB". Blackbury High School has 1000 pupils, with 28 pupils in class 4T.
(a) (i) Write down a distribution that could be used to model the number of pupils in class 4T with blood group AB. (ii) Hence calculate the probability that there are exactly two pupils in class 4T with blood group AB.
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Related Book For 
A Concise Course In Advanced Level Statistics With Worked Examples
ISBN: 9780748754755
4th Edition
Authors: J. Crawshaw, J. Chambers
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