Question

Find out the number of permutations which can be formed out of the letters of the word $series$ taken three together.


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Answer 1

the number of permutations which can be formed out of the letters of the word Series taken three together.

=6P3/2!×2!

=6!/3!2!2!

=30 word

Hope it will help uh

Answer 2

Find out the number of permutations which can be formed out of the letters of the word $series$ taken three together.

Total no of ways = 6N3.

But there are four letters (S, E, R, I)

S and E are repeating, so two places are interchangeable.

So total no = 6!/3! / 2!*2!

= 6*5*4/2*2

= 30.