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An examination paper consists of 12 ques...

An examination paper consists of 12 questions diyided in to part A and B. Part A contains 7 questions and part B contains 5 questions. A candidate is required to attempt 8 questions, selecting atleat 3 questions from each part. In how many ways can the candidate select the questions ?

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MOTION-THEORY AND EXERCISE BOOK-EXERCISE -3
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  10. (i) Prove that: ""^(n)P(r) = ""^(n-1)P(r) + r. ""^(n-1)P(r–1) (ii) ...

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  16. Number of words each consisting of two vowels and two consonants which...

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  20. The number of ways of forming the committee, is

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