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In an examination there are three multi...

In an examination there are three multiple choice questions and each question has 5 choices Number of ways in which a student can fail to get all answer correct is

A

125

B

124

C

64

D

63

Text Solution

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The correct Answer is:
B
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SURA PUBLICATION-COMBINATORICS AND MATHEMATICAL INDUCTION -Exercise 4.5
  1. The sum of the digits at the 10th place of all numbers formed with t...

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  2. In an examination there are three multiple choice questions and each...

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  3. The number of ways in which of following prize be given to a clas...

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  4. The number of 5 digit numbers all digits of which are odd is

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  5. In 3 fingers , the number of ways four rings can be worn is ……ways

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  6. If .^(n+5) P(n +1) = ((11(n-1))/2) .^(n +3) P(n) then the value of n...

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  7. The product of r consecutive positive integers is divisible by

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  8. The number of five digit telephone numbers having at least one of ...

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  9. If .^(a^(2-a)) C(2) = a^(2-a) C(4) then the value of a is

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  10. There are 10 points in a plane and 4 of them are collinear. The nu...

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  11. The number of ways in which a host lady invite 8 people for a par...

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  12. The number of parallelograms that can be formed from a set of four...

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  13. Everybody in a room shakes hands with everybody else. The total n...

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  14. Number of sides of a polygon having 44 diagonals is

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  15. If 10 lines are drawn in a plane such that no two of them are parallel...

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  16. In a plane are 10 points are there out of which 4 points are coll...

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  17. In .^(2n)C(3) :.^(n)C(3) = 11 : 1 then n is

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  18. .^((n-1)C(r) + ^((n-1)) C((r-1)) is

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  19. The number of ways of choosing 5 cards out of a deck of 52 which ...

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  20. The number of rectangles that a chessboard has

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