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Question
In how many ways 4 people out of 6 people can be seated in a row for a photograph?
In how many ways 4 people out of 6 people can be seated in a row for a photograph?
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Solution
In a row, 4 people out of 6 people can be arranged in 
ways.
Thus, 4 people out of 6 people can be seated in a row in 360 ways.
In a row, 4 people out of 6 people can be arranged in ways.
Thus, 4 people out of 6 people can be seated in a row in 360 ways.
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