Find out the rank of MONDAY in English dictionary if all alphabets are arranged in order?
The correct answer is 327.
\(\therefore\) Rank = \((2\times5!+3\times 4!+2\times 3!+1\times2!)+1\)
= 240+72+12+2+1
= 327
How many possible words can be created from the letters R, A, N, D (with repetition)?
Permutation is the method or the act of arranging members of a set into an order or a sequence.
Combination is the method of forming subsets by selecting data from a larger set in a way that the selection order does not matter.