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Solution


Q.

All words, with or without meaning, are made using all the letters of the word MONDAY. These words are written as in a dictionary with serial numbers. The serial number of the word MONDAY is             [2023]
1 327  
2 328  
3 326   
4 324  

Ans.

(1)

Given, A, D, M, N, O, Y

A → 5! ; D → 5! ; M A → 4! ; M N → 4!

M O A → 3! ; M O D → 3! ; M O N A → 2! ; M O N D A Y

⇒ Rank = 2(5)! + 3(4)! + 2(3)! + 2! + 1

             = 240 + 72 + 12 + 2 + 1 = 327