Problematic Mathematics, or Simple Logic?

Probability Level 2

You have to choose 40 numbers, each having a value less than 100.

How many combinations can be made such that the average of these 40 numbers is greater than 120?

None of These

\left( \begin{matrix} 40 \\ 10 \end{matrix} \right)

\left( \begin{matrix} 40 \\ 40 \end{matrix} \right)

120 59

\left( \begin{matrix} 40 \\ 25 \end{matrix} \right)

124