JEE MATHEMATICS MCQ: PERMUTATIONS

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Five distinct letters are to be transmitted through a communication channel. A total number of 15 blanks is to be inserted between the two letters with at least three between every two. The number of ways in which this can be done is

t

then

\frac{t}{400}

is.

View answer and explanation

Correct option: A

Option A (6) is correct because the number of ways to insert the blanks is calculated using combinations, and then multiplied by the number of permutations of the letters.

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