JEE MATHEMATICS MCQ: PERMUTATIONS

1 Medium

1 of 1

Application +4 | -1

Let

{n} \in N

satisfy

{ }^{2 {n}+1} {P}_{{n}-1} /{ }^{{2n}+1} {P}_{{n}}=\frac{3}{5}

then equals to

View answer and explanation

Correct option: B

Option C (101) is correct because it calculates the number of words preceding 'WATER' in the dictionary by considering the alphabetical order of the letters.

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