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Numerical Ability
Permutation and Combination
In how many rearrangements of word AMAZED is the letter 'E' positioned in between the 2 'A's
(not necessarily flanked)?
1)24
2)72
3)120
4)240
Read Solution (Total 16)
-
- sorry its not necessary to be flanked
(AEA)MZD=4!=24
(AEMA)ZD=3!*2!=12
(AEMDA)Z=2!*3!=12
(AEMDZA)=4!=24
72 ANS - 12 years agoHelpfull: Yes(24) No(8)
- ans:3)120
sol: at the 1st and last(sixth) place E can't be placed
for 2nd and 5th place E(based on condition)....2*4!=48
for 3rd and 4th place E........................2*(3*3*2*2)=72 or
2*[(4!-3!)*2!]=72 (in other way can do this but both wil lgive same ans 72)
so total arrangements=48+72=120
- 12 years agoHelpfull: Yes(13) No(9)
- In any rearrangement of the word, consider only the positions of the letters A, A and E.
These can be as A A E, A E A or E A A.
So, effectively one-third of all words will have 'E' in between the two 'A's.
The total number of rearrangements are = 360.
One-third of 360 is 120.
- 12 years agoHelpfull: Yes(9) No(3)
- bcz flank is not necessary so only AEA will not consider. there may be AMEAZD.
there is also E is between 2A's.
so ans will be 120 - 12 years agoHelpfull: Yes(7) No(7)
- (aea)zmd 4!=24
- 12 years agoHelpfull: Yes(5) No(8)
- we would place aea in a group and rest will be arranged as independent entities
so the ans is 4! - 12 years agoHelpfull: Yes(4) No(5)
- if anyone can elaborate more on this???
- 12 years agoHelpfull: Yes(3) No(0)
- According to the question
E positioned between 2 A
take AEA as 1 part.
then total 4 parts. then there will be 4 places.
place 1 can be arranged in 4 ways
place 2 can be arranged in 3 ways
place 3 can be arranged in 2 ways
place 4 can be arranged in 1 ways
so total 4! i.e. 4*3*2*1 = 24 - 12 years agoHelpfull: Yes(3) No(1)
- 120
(aea)zmd=48
azmeda=48
zameda=12
amedaz=12
total=120
- 12 years agoHelpfull: Yes(2) No(3)
- ans is 4*6=24
- 12 years agoHelpfull: Yes(2) No(4)
- in this question E should be in between two A like 'AEA' considered it as a single element then total no.of alphabates is 4
it can be arranged 4!=24
nd AEA can be arranged 3!=6 in which A come two time so 6/2!=3
now total arrangement is 24*3=72 ans. - 12 years agoHelpfull: Yes(2) No(1)
- please elaborate it na unable to catch it
- 12 years agoHelpfull: Yes(0) No(0)
- friend's it should be 4!
- 12 years agoHelpfull: Yes(0) No(2)
- (AEA)taken as 1 so total letters in (AEA)ZMD are 4
combinations possible are 4!=24. - 12 years agoHelpfull: Yes(0) No(2)
- take AEA as a unit so total way = 4!=24
- 12 years agoHelpfull: Yes(0) No(1)
- keep aea as one set and the terms aea,m,z,d can be arranged in 4! ways...so answer is 24...
- 12 years agoHelpfull: Yes(0) No(0)
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