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A man has 6 friends. The number of ways ...

A man has 6 friends. The number of ways can he invite one or more of them to dinner is

A

63

B

64

C

720

D

6

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The correct Answer is:
A
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-PRACTICE EXERCISE
  1. p points are chosen on each of the three coplanar lines. The maximum n...

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  2. A regular polygon of 10 sides is constructed No. of ways 3 vertices be...

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  3. A man has 6 friends. The number of ways can he invite one or more of t...

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  4. The number of ways in which one or more balls can be selected...

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  5. A Fruits basket contains 4 organes , 5 apples and 6 mangoes ....

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  6. In a cross word puzzle 25 words are to be gussed of which 5 ...

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  7. How many different sums can be formed with the following coins ...

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  8. A question paper contains 6 question each having an alternativ...

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  9. In a packet there are m different books, n different pens and p differ...

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  10. The number of divisors of 2^(6)3^(5)5^(3)7^(4)11 is

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  11. The sum of divisores of 2^(5).3^(4) is

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  12. The number of positive divisors of 2 ^5 , 3^6 ,7^3 is

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  13. The number of all positive divisors of 2 ^5 , 3^4 , 5^3 is

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  14. Number of even proper divisors of 1008 is

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  15. The number of positive odd divisors of 216 is

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  16. The number of odd factors of 36000 is

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  17. The number of ways the numbers 10,800 can be resolved as a product of ...

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  18. The number of ways in which 1440 can be divided into two factors exclu...

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  19. The sum of odd divisors of 360 is

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  20. If one quarter of all three element subsets of the set A={a(1), a(2), ...

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