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Permutation and Combination
what will be the rank of word OPTION in the dictionary of words formed by letters of the word OPTION
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- No of words starting with I = 5!/2 =60
No of words starting with N = 5!/2 =60
No of words starting with OI = 4! =24
No of words starting with ON = 4! =24
No of words starting with OO = 4! =24
No of words starting with OPI= 3! =6
No of words starting with OPN= 3! =6
No of words starting with OPO= 3! =6
No of words starting with OPTIN= 1! =1
60+60+24+24+24+6+6+6+1=211
and 211+1 will be OPTION
OPTION is 212th word
- 11 years agoHelpfull: Yes(17) No(3)
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