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Numerical Ability
Permutation and Combination
For the word SURITI, if you arrange the letters in dictionary order then what is its rank?
(a) 234
(b) 235
(c) 236
(d) 237
Read Solution (Total 11)
-
- this is the shortcut to find the rank
SURITI-352141(no.it in the alp.order,if it is repeated give the same no)
for the letter "S" the alp.no is 3, in the right side find the nos..less than 3,there are 3(2,1,1) nos so its 3/2!(repetition of I)
"U" the alp. no is 5 there are 4(2,1,4,1)less nos in right side so its 4/2!(rept.of I)
"R" in the same way then it is 2/2!
"I" its alp.no is 1 it dont have any less no so 0/2!(u need to consider the present I also)
"T" =1/1!(there is no rept of letters)
"I"=0/1!
then give ! order as S U R I T I
5! 4! 3! 2! 1! 0!
then * the both,
= (3/2!)*5! + (4/2!)*4! + (2/2!)*3! + (0/2!)*2! + (1/1!)*1! + (0/1!)*0! +1
= 180 + 48 + 6 + 0 + 1 + 0 + 1
= 236
hope this will be helpful - 11 years agoHelpfull: Yes(17) No(3)
- 236 is rank of SURITI,if you arrange the letters in dictionary order.
- 12 years agoHelpfull: Yes(8) No(21)
- can anybody explain it clearly.
- 11 years agoHelpfull: Yes(3) No(2)
- pplzzz explain clearly
- 11 years agoHelpfull: Yes(1) No(0)
- I= 5! =120
R=5!/2 =60
SI=4! =24
SR=4!/2= 12
ST=4!/2= 12
SUI=3! = 6
= 234 WORDS
AND WE CAN MAKE THESE 2 WORDS
SURIIT
SURITI = 236
SO RANK IS 236 - 9 years agoHelpfull: Yes(1) No(0)
- -->option (c)
in ascending order of alphabets--> I,R,S,T,U
no. of words formed by taking I as first letter=5! // I _ _ _ _ _
no. of words formed by taking R as first letter=5!/2! // R _ _ _ _ _ since we have two I's
no. of words formed by taking SI as first two letters=4! // SI _ _ _ _
no. of words formed by taking SR as first two letters=4! /2! // SR _ _ _ _ two I's
no. of words formed by taking SUI as first three letters=3! // SUI _ _ _
and next two words are SURIIT
SURITI
so position of suriti =120+60+24+12+12+6+2=236
- 9 years agoHelpfull: Yes(1) No(0)
- 236 is the answer
- 11 years agoHelpfull: Yes(0) No(14)
- plz explain clearly....i can't able to understand...
- 10 years agoHelpfull: Yes(0) No(0)
- VINOTHINI, yar its amazing trick given by u to solve this riddle....
- 10 years agoHelpfull: Yes(0) No(0)
- in ascending order of alphabets--> I,R,S,T,U
no. of words formed by taking I as first letter=5! // I _ _ _ _ _
no. of words formed by taking R as first letter=5!/2! // R _ _ _ _ _ since we have two I's
no. of words formed by taking SI as first two letters=4! // SI _ _ _ _
no. of words formed by taking SR as first two letters=4! /2! // SR _ _ _ _ two I's
no. of words formed by taking SUI as first three letters=3! // SUI _ _ _
and next two words are SURIIT
SURITI
so position of suriti =120+60+24+12+12+6+2=236
- 9 years agoHelpfull: Yes(0) No(0)
- the solution and rank is 235.
- 5 years agoHelpfull: Yes(0) No(1)
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