Permutations & Combinations
Dictionary Order — Serial Number of MONDAY
nta_pyq_2023_apr
Grade 11
Question:
All words from MONDAY in dictionary order. Serial number of MONDAY is
Step-by-Step Solution
Key Concept: Alphabetical: A,D,M,N,O,Y. Words before M: $2\times5!=240$. Words MA..., MD...: $2\times4!=48$. Words MO before MON: $1\times3!=6$... etc.
Serial number $=327$.
Correct Answer: 1