If the letters of the word CORONA are arranged in all possible ways and these words are written in order of a dictionary, then the word CORONA appears at the serial number

Question

If the letters of the word CORONA are arranged in all possible ways and these words are written in order of a dictionary, then the word CORONA appears at the serial number, 108, 110, 106, 112

MARKS App · Accepted Answer

A C N O O R Number of words starting with A → 5 ! 2 ! = 60 C A → 4 ! 2 ! = 12 C N → 4 ! 2 ! = 12 C O A → 3 ! = 6 C O N → 3 ! = 6 C O O → 3 ! = 6 C O R A → 2 ! = 2 C O R N → 2 ! = 2 C O R O A N → 1 = 1 C O R O N A → 1 = 1 108 ¯ So, the serial number of the word C O R O N A is 108 .

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