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

• the ans is ---> 242
• 5 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.
• 5 years agoHelpfull: Yes(0) No(1)