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Question 128
How many meaningful English words can be made with the letters ERDU using each letter only once in each word ?
Solution
Let us write down all the permutations which can be there using these 4 letters and then we can figure out the meaningful word.
ERDU ERUD EDRU EDUR EURD EUDR
RUDE RUED RDUE RDEU REDU REUD
UERD UEDR UDRE UDER URED URDE
DURE DUER DREU DRUE DERU DEUR
So the meaningful words which can be formed using given letters is RUDE, RUED
So there are two meaningful words which can be formed using given letters. Thus the correct answer is option 3
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