exam
Maths Puzzle
The letter of the word LABOUR are permuted in all possible ways and the words thus formed are arranged as in a dictionary. What is the rank of the word LABOUR?
A.
275
B.
251
C.
240
D.
242
Read Solution (Total 2)
-
- the ans is ---> 242
- 6 years agoHelpfull: Yes(0) No(1)
- The order of the dictionary form is ------ ABLORU.
start with A , remaining letters ---- in 5! ways.
B in the remaining letters ----------- 5! ways.
With L in the beginning, the first word will be LABORU, the second will be LABOUR.
Hence, the rank of the word LABOUR is,
5!+5!+2 = 120 +120 +2 =242. - 6 years agoHelpfull: Yes(0) No(1)
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