How would you use permutations to find the arrangements possible

Gaaljh 2022-06-27 Answered
How would you use permutations to find the arrangements possible if a line has 2 girls want to stand together?
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Answers (1)

Amy Daniels
Answered 2022-06-28 Author has 20 answers
Step 1
Ii the line is for N persons and two girls have to stand together, count the two girls as 1 person.
Then, the number of permutations is ( N - 1 ) ! .
Step 2
For every such arrangement, these two girls can stand in two ways, one after the other..
So, overall, the number of permutations is 2 X ( N - 1 ) ! .
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