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A committee of 5 members is selected randomly from 10 parents, 16 students and 4 teachers. how can one find the probability that a teacher will be the chairman if the first person selected is to be made chairman.

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up vote 3 down vote accepted

For a teacher to be Chair, we need to select a teacher on the first pick. How many people are there? How many teachers? (The size of the committee is irrelevant.)

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Is the answer 4/30? –  count Jun 5 '12 at 5:57
    
Yes.${}{}{}{}{}{}{}{}{}{}{}$ –  André Nicolas Jun 5 '12 at 6:01
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