If A1 = avg (a, b, c) and A2 = avg (avg (a, b), avg (b, c), avg(c, a)), then
Explanation:
A1 = a+b+c3
A2 = avg a+b2,b+c2,c+a2 = a+b+c3
⇒ A1 = A2
Hence, option (a).
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