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Permutations an...

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  • Question 1
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    C(n,12) = C(n,8) N = ?

  • Question 2
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    In a college there are 20 professors including the principal and the vice principal. A committee of 5 is to be formed. In how many ways it can be formed so that neither the principal nor the vice principal is included?

  • Question 3
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    What is the number of diagonals that can be drawn by joining the vertices of a hexagon?

  • Question 4
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    Nidhi has 6 friends. In how many ways can she invite one or more of them to a party at her home?

  • Question 5
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    If C(n,4) = 495. Find n.

  • Question 6
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    If n C8 = n C2 , then n is

  • Question 7
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    8 Cr  = 8 Cp . So

  • Question 8
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    What is the number of ways of choosing 6 cards from a pack of 52 playing cards?

  • Question 9
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    If   = c. Find c.

  • Question 10
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    In how many ways can a cricket team of 11 players selected out of 16 players if two particular players are to be included and one particular player is to be rejected?

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