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Question

How many words can be formed with the letters of the word CHAIR such that A is always before I

A
120
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B
180
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C
60
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D
90
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Solution

The correct option is C 60
Number of letters in the given word =5
Number of words formed with A before I=Number of words with I before A
Total number of words formed =5!=120
Required number of words =1202=60

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