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N1994 P1 Q10

N1994 P1 Q10

Junior College 2
3 marks

A set of 20 students is made up of 10 students from each of two different year-groups. Five students are to be selected from the set, and the order of selection is unimportant. Find

  1. the total number of possible selections,[1]
  2. the number of selections in which there are at least two students from each of the two year-groups.[2]

Solution:

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Answer:(i) \(15504\). (ii) \(10800\).

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