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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 29, 2022
 #2
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Row 0: 1

Row 1: 1 1

Row 2: 1 2 1

Row 3: 1 3  3 1   ---> the average of the entries in this row is 2.

 Dec 29, 2022

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