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Combination and Permutation

Combination and Permutation. Example 1. There are 10 electional courses and a student has to take 6 of them. If 3 of 10 lessons are at the same time then, how many ways possible for a student to take 6 lessons?. Example 2.

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Combination and Permutation

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  1. Combination and Permutation

  2. Example 1 • There are 10 electional courses and a student has to take 6 of them. If 3 of 10 lessons are at the same time then, how many ways possible for a student to take 6 lessons?

  3. Example 2 • Suppose that n people are seated in a random manner in a row of theatre seats. What is the probability that two particular people A and B will be seated next to each other?

  4. Example 3 • For a given set A={0,1,2,3,4} • How many 3 digit odd number can be written without repeating? • How many number more then 3000 can be written without repeating?

  5. Example 4 • For a given set A={a,b,c,d,e,f} • How many 3-element subsets has a? • How many 4-element subsets has b, but not c?

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