SOLUTION: How many different 20 persons committee can be formed each containing at least 2 professors and atleast 3 associate professors from a set of 10 professors and 42 associate professo

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Question 655278: How many different 20 persons committee can be formed each containing at least 2 professors and atleast 3 associate professors from a set of 10 professors and 42 associate professors.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

How many different 20 persons committee can be formed each containing at least 2 professors and atleast 3 associate professors 

from a set of 10 professors and 42 associate professors. 52 professors in all

   52C20+-+10C1%2A42C19++-+10C0%2A42C20+