UPSC Government Jobs Exams Category

In how many ways can the letter of the word DELHI be arranged so that the letters E and I occupy only even places?

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UPSC Other Question

A family of 4 brothers and 3 sisters is to be arranged for a photograph in one row. In how many ways can they be seated if
(i) all the sisters sit together
(ii) No 2 sisters sit together
In how many ways can the letters of the word ‘FRACTION’ be arranged so that no two vowels are together?