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The number of subsets of {1,2,3,. . . ...

The number of subsets of {1,2,3,. . . .9} conatining at least one odd number is :

A

324

B

396

C

496

D

512

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The correct Answer is:
C
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-PRACTICE EXERCISE
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  2. The number of subsets of the set A={a(1),a(2),………..a(n)} which contain...

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  3. The number of subsets of {1,2,3,. . . .9} conatining at least one ...

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  4. A set contains (2n+1) elements. If the number of subsets of this set w...

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  5. In an election, no. of candidates is one more than the number of perso...

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  6. The number of ways of dividing 12 boys into 2 groups of 7,5 boys r...

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  7. The number of ways in which 12 books can be put in 3 shelves, 4 on eac...

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  8. The number of ways of dividing 100 scouts into 3 squads of 50, 30, 20 ...

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  9. The number of ways of dividing 15 cards into 3 groups of 5 cards each ...

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  10. If the number of subsets with 8 elements from the set A={a(1),a(2),a(3...

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  11. At an election three wards of a town of a are canvassed by ...

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  12. Number of ways to give 16 different things to A, B, C so that B gets 1...

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  14. The number of ways in which 13 gold coins can be distributed ...

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  16. The number of 5 digited numbers using all the digits 2, 4, 6, 8 is

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  17. The number of 4 letter words can be formed from the letters of the wor...

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  18. There are 12 boys to be seated on 2 benches , 6 on each lenc...

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  19. Out of 7 consonants and 5 vowels how many different words can...

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