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The entries in a certain row of Pascal's triangle are

1, n, ..., n, 1

 

The average of the entries in this row is 2.  Find n.

 Dec 13, 2022
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1

1 2 1

1 3 3 1

1 4 6 4 1

 

the third row has an average of 2, so n =3

 Dec 13, 2022

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