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The number of signals that can be sent b...

The number of signals that can be sent by 5 flags of different colours, taking one or more at a time is :

A

63

B

1956

C

720

D

21

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The correct Answer is:
B
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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS -OBJECTIVE TYPE QUESTIONS (A) MULTIPLE CHOICE QUESTIONS
  1. All the letters of the word 'EAMCOT' are arranged in different posible...

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  2. 10 different letters of an alphabet are given. Words with 5 letters ar...

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  3. The number of signals that can be sent by 5 flags of different colours...

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

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  5. If 1/(9!)+1/(10!)=x/(11!) then x=

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  6. L.C.M. of 3!, 4! And 5! Is :

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  7. 7!-5! is equal to :

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  8. The value of f(4) - f(3) is

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  9. If 1/(8!)+1/(9!)=x/(10 !),find x

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  10. The correct match of the following is : {:(,"Column - I",,"Column ...

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  11. The correct match of the following is : {:(,"Column I",,"Column II...

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  12. (7!) / (5!) is :

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  13. The value of |ul(4)-|ul(3) is :

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  14. If ""^(n)C(12)=""^(n)C(8), then n is equal to

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  15. The number of all numbers having 5 digits, with distinct digits, is :

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  16. The number of words that can be formed by using all the letters of the...

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  17. Given five line segments of length 2, 3, 4, 5, 6 units. Then the numb...

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  18. How many numbers greater than 10 lacs be formed from 2,3,0,3,4,2,3? 42...

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  19. The remainder obtained when 1!+2!+3!+……+11! is divided by 12 is :

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  20. The value of ""^(2)P(1)+""^(3)P(1)+……+ ""^(n)P(1) is equal to :

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