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Can someone please answer. There is one problem. There's a picture. Thank you!

Can someone please answer. There is one problem. There's a picture. Thank you!
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Can someone please answer. There is one problem. There's a picture. Thank you!

Can someone please answer. There is one problem. There's a picture. Thank you!-example-1
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User Bloudraak
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1 Answer

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\displaystyle \binom{10}{7}=(10!)/(7!3!)=(8\cdot9\cdot10)/(6)=120
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User Timfreilly
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