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votes

$\text{A, B, C}$ are three numbers.

Let $@ \text{(A, B)} =$ average of $\text{A}$ and $\text{B}$,

$/ \text{(A, B)} = $ product of $\text{A}$ and $\text{B}$, and

$\text{X(A, B)} = $ the result of dividing $\text{A}$ by $\text{B}$

Average of $\text{A, B}$ and $\text{C}$ is given by

- $@(/(@(/\text{(B, A)}, 2), \text{C)}, 3)$
- $\text{X(}@(/(@\text{(B, A)}, 3), \text{C)}, 2)$
- $/(@(\text{X(}@\text{(B, A)}, 2), \text{C)}, 3)$
- $/(\text{X(}@(/(@\text{(B, A)}, 2), \text{C)}, 3), 2)$

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