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Four digit numbers formed with 1, 2, 4, ...

Four digit numbers formed with 1, 2, 4, 6, 8 without repetition are formed in ascending order. Then the rank of 4618 is

A

31

B

62

C

124

D

248

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-EXERCISE-II
  1. All the numbers that can be formed using all the digits at a time from...

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  2. All the numbers that can be formed using 1, 2, 3, 4, 5 are arranged in...

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  3. Four digit numbers formed with 1, 2, 4, 6, 8 without repetition are fo...

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  4. The sum of the digits in the unit place of all the numbers formed with...

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  5. The sum of the numbers formed by taking all the digits at a time from ...

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  6. Sum of four digit numbers formed with 2,3,4,5 using each digit any num...

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  7. Find the sum of all 4 digited numbers that can be formed using the dig...

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  8. Find the sum of all 4 digited numbers that can be formed using the dig...

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  9. The sum of the digits in the unit place of all the numbers formed with...

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  10. f:AtoA,A={a(1),a(2),a(3),a(4),a(5)}, the number of one one functions ...

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  11. The number of ways in which 4 letters can be put in 4 addressed envelo...

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  12. If the 4 letter words formed by using the letters of the word EQUATION...

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  13. Assertion (A): The number of ways in which 5 boys and 5 girls can sit ...

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  14. Assertion (A) : The number of ways in which 6 persons can sit around a...

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  15. sum(r=0)^(n)(P(r))/(r!) is equal to

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  16. If ""^(n)P(r)=""^(n)P((r+1))and ""^(n)C(r) = ""^(n)C(r-1), then (n,...

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  17. IF ""^(n) P(r)=720,""^(n)C(r)=120then (n,r)=

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  18. ""^(2n)C(n+1)+2. ""^(2n)C(n) + ""^(2n) C(n-1) =

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  19. the value of ""^50C(4) + underset( r=1) overset( 6 ) sum ""^(56...

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  20. sum( r=0 )^ ( 10) ( 40 -r)C (5)=

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