<PRE><B>Question 75898</B>
Some managers are to be selected from a group of 30 to work on a special project.
a. In how many ways can 3 managers be selected?
30C2 = [30*29*28]/[1*2*3] = 4060
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b. In how many ways can a nonempty group of at most 3 managers be selected from the 30 managers? 
30C1 + 30C2 + 30C3
30 + 435 + 4060 = 4525
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Cheers,
Stan H.

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