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Numerical Ability
Permutation and Combination
the letters in the word ROADIE are permuted in all possible ways and arranged in alphabetical order. find the word in 44 rank.
Read Solution (Total 7)
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- A[DEIOR] =5!=120 NOT POSSIBLE
AD[EIOR] = 4! = 24
AE[DIOR] = 4! = 24
AED[1OR] = 3! = 6+24=30
AEI[DOR] =3! = 6+30 =36
AEO[DIR] = 3! = 36+6 =42
NOW 43RD LETTER WOULD BE AERDIO
AND HENCE 44TH IS AERDOI
- 10 years agoHelpfull: Yes(40) No(7)
- A D - - - - =4!=24
A E D - - -= 3!=6
A E I - - -=3!=6
A E O - - - =3!=6
A E R D I O=1
A E R D O I=1
so 44th no is AERDOI - 10 years agoHelpfull: Yes(6) No(0)
- KARTHIKEYANK can u please tell me more clearly..how did u take 6+24, 6+30, 36+6 and why Ist one is not possible
- 10 years agoHelpfull: Yes(2) No(0)
- AD----=4!=24
ADE___=3!=6
ADI___=3!=6
ADO___=3!=6
ADOEIR=1
ADOIER=1
24+6+6+6+1+1=44=ADOEIR - 10 years agoHelpfull: Yes(2) No(3)
- can any one explain me that why we r taking AE[DIOR]
- 10 years agoHelpfull: Yes(0) No(1)
- becoz it is the alphabetical order
- 10 years agoHelpfull: Yes(0) No(0)
- please explain clear
- 10 years agoHelpfull: Yes(0) No(0)
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