If letters of the work KUBER are written in all possible orders and arranged as in a dictionary, then the rank of the word KUBER will be:
A. 67
B. 68
C. 65
D. 69
Answer: Option A
Solution (By Examveda Team)
Step 1: Arrange the letters in alphabetical orderThe word KUBER consists of the letters:
B, E, K, R, U (sorted order)
Step 2: Count words before "KUBER"
Words starting with 'B' = 4! = 24
Words starting with 'E' = 4! = 24
Words starting with 'K' and second letter 'B' = 3! = 6
Words starting with 'K' and second letter 'E' = 3! = 6
Words starting with 'K' and second letter 'R' = 3! = 6
Step 3: Find the position of "KUBER"
After 24 (B) + 24 (E) + 6 (KB) + 6 (KE) + 6 (KR) = 66 words, the next word is KUBER
Rank of "KUBER" = 67
Final Answer: Option A (67)
This Question Belongs to Arithmetic Ability >> Permutation And Combination
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Comments (9)
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C. 4! 4!
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A. 7560,60,1680
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C. 7650,200,4444
D. None of these
A. 8 × 9!
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65 should be the answer
Ranking; 3 5 1 2 4
Alphabet; K U B E R
Alphabet 2 3 0 0 0
with .......
smaller
ranking
than..; X X X X X
4! 3! 2! 1! 0!
........................SOLUTION.............................................
2X4!+3X3!+1
mereko kuch samajh nahi aya
Why you take 2 single and 3 double letters here?
I Couldn't understand
why didn't we complete the word till the final and add the order after ER also ??
I am unable to understand this question totally
What and where you don't understand?
i could not understand