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Tamil Nadu Board of Secondary EducationHSC Science Class 11

In how many ways can the letters of the word SUCCESS be arranged so that all Ss are together?

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Question

In how many ways can the letters of the word SUCCESS be arranged so that all Ss are together?

Sum
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Solution

SUCCESS

Number of letters = 7

Number of ‘S’ = 3

Since we want all ‘S’ together treat all 3 S’s as 1 unit.

Now the remaining letters = 4

∴ Total number of unit = 5

They can be arranged in 5! ways of them C repeats two times.

So total number of arrangements = `(5!)/(2!)` = 60

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Chapter 4: Combinatorics and Mathematical Induction - Exercise 4.2 [Page 178]

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Samacheer Kalvi Mathematics - Volume 1 and 2 [English] Class 11 TN Board
Chapter 4 Combinatorics and Mathematical Induction
Exercise 4.2 | Q 12 | Page 178

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