Question
From 10 candidates, how many selections of 5 can be made so as to (a) include both the youngest and the oldest and (b) exclude the youngest if it includes the oldest?
Step 1
Among them, one is the youngest and one is the oldest. So, we have 8 normal candidates. Show more…
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Reasoning
Puzzles
There are eight candidates for a particular post. In how many ways can a selection be made of four amongst them, so that (a) 2 persons whose qualifications are below par are included? (b) 2 persons whose qualifications are outstanding are included?
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