UPSC Government Jobs Exams undefined

In how many ways can the letters of the word ‘FRACTION’ be arranged so that no two vowels are together?

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UPSC Other Question

In how many ways can the letter of the word DELHI be arranged so that the letters E and I occupy only even places? In how many ways can 6 plastic beads of different colours be arranged so that the blue and green beads are never placed together?