SOLUTION: a candidate is required to answer six out of ten question which are divide into groups,each containing five question and he is not permitted to attempt more than 4 from any group.i

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Question 1135314: a candidate is required to answer six out of ten question which are divide into groups,each containing five question and he is not permitted to attempt more than 4 from any group.in how many ways can he make up his choice?
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
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2 questions from group A and 4 questions from group B  ( C%5B5%5D%5E2%2AC%5B5%5D%5E4 ways)  PLUS

3 questions from group A and 3 questions from group B  ( C%5B5%5D%5E3%2AC%5B5%5D%5E3 ways)  PLUS

4 questions from group A and 2 questions from group B  ( C%5B5%5D%5E4%2AC%5B5%5D%5E2 ways).


The answer is the sum

    C%5B5%5D%5E2%2AC%5B5%5D%5E4 + C%5B5%5D%5E3%2AC%5B5%5D%5E3 + C%5B5%5D%5E4%2AC%5B5%5D%5E2 = 

    10*5    +  10*10 +  5*10 = 200.


ANSWER.  200 ways.

Solved.