IIT JEE , AIEEE Forum - Mathematics , Algebra

sk_saini1965

In how many ways can the letters of the word PERMUTATIONS be arranged if there are always four letters between P & S?

Aatish

when there will be only four letters in between P & S

then we can arrange P & S at this particular distance 14 times.

And for the remaining alphabets no. of permutations is (10! / 2!)

And thus total No. of permutations will be = (10! / 2! ) * 14

= 25401600

Cheers..........

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