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Math Help - select 21 questions

  1. #1
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    select 21 questions

    You have a test paper consisting of 35 questions.
    The test paper consists of 4 Parts - A,B,C and D.
    Part A consists of 7 questions.
    Part B has 8 questions.
    Part C has 10 questions.
    Part D has 10 questions.
    From part A you need to do atleast 3 questions.
    From part B and C together you need to do 5 questions atleast.
    From Part C and D together you can do atmost 7 questions.
    You need to attempt a total of 21 questions from the whole paper.
    in how many ways can you attempt the test paper?
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  2. #2
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    Re: select 21 questions

    Quote Originally Posted by jashansinghal View Post
    Part A consists of 7 questions.
    From part A you need to do at least 3 questions.
    Why would anyone answer 4 or more when not required?!
    Anyway, are there 5 number of ways here: 3 or 4 or 5 or 6 or 7?
    Or is the meaning to pick 3 out of the 7?
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  3. #3
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    Re: select 21 questions

    Quote Originally Posted by Wilmer View Post
    Why would anyone answer 4 or more when not required?!
    Anyway, are there 5 number of ways here: 3 or 4 or 5 or 6 or 7?
    Or is the meaning to pick 3 out of the 7?
    Because he must "attempt a total of 21 questions" while the "required" number from each section adds to only 15.
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