NDA 2025 Mathematics question

In how many ways can the letters of the word DELHI be arranged keeping the positions of vowels and consonants unchanged?

Answer: (C)

Solution

In DELHI the vowels E, I occupy the 2nd and 5th places, and the consonants D, L, H occupy the 1st, 3rd and 4th places. The 2 vowels can be permuted

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Question ID VK-030029