Q. There are 10 people stand in a line to take a photo. Two photos are said different if at least two people's positions are changed. How many different photos can we take?

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Chapter14: Counting And Probability
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Q. There are 10 people stand in a line to take a photo. Two photos are
said different if at least two people's positions are changed. How many
different photos can we take?
Transcribed Image Text:Q. There are 10 people stand in a line to take a photo. Two photos are said different if at least two people's positions are changed. How many different photos can we take?
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