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JEE Main Mathematics question

MathematicsPermutations and CombinationsJEE Main

We are to form different words with the letters of the word INTEGER. Let be the number of words in which I and N are never together and be the number of words which begin with I and end with R, then is equal to

Answer: (A)

Solution

INTEGER has letters with twice, so all words number ; words with I and N together number , so

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Question ID VK-020603