MathDB

Arithmetic mean of integers of a set

Source:

April 24, 2011

Problem Statement

One integer was removed from the set

S=\left \{ 1,2,3,...,n \right \}

of the integers from

1

to

n

. The arithmetic mean of the other integers of

S

is equal to

\frac{163}{4}

. What integer was removed ?

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