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Question
How many words can be formed by arranging the letters of the word 'MUMBAI' so that all M's come together?
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Solution
The word MUMBAI consists of 6 letters taht include two Ms.
When we consider both the Ms as a single entity, we are left with 5 entities that can be arranged in 5! ways.
Total number of words that can be formed with all the Ms together = 5! = 120
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