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NDA 2023

Exam: NDA
Year: 2023
Subject: Mathematics
Chapter: Permutation and Combination

NDA 2023 · Mathematics · Permutation and Combination

Let x be the number of permutations of the word 'PERMUTATIONS' and...

Let

x

be the number of permutations of the word 'PERMUTATIONS' and

y

be the number of permutations of the word 'COMBINATIONS'. Which one of the following is correct?

Options

A $x=y$
B $y=2 x$
C $x=4 y$
D $y=4 x$

Correct answer

C. $x=4 y$

Step-by-step solution

PERMUTATIONS

x=\frac{12!}{2!} \quad[\because

T Comes 2 times

]

\therefore \quad x=4 y

.

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