A) \[\frac{\mathbf{a}+\mathbf{b}+\mathbf{c}}{3}\]
B) \[\frac{1}{2}\,\left( \mathbf{a}+\frac{\mathbf{b}+\mathbf{c}}{2} \right)\]
C) \[\mathbf{a}+\frac{\mathbf{b}+\mathbf{c}}{2}\]
D) \[\frac{\mathbf{a}+\mathbf{b}+\mathbf{c}}{2}\]
Correct Answer: A
Solution :
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