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The average (arithmetic mean) of 330, 360 and 390 is :
Answer & Solution
Correct Answer:
Option
B
According to the question,
$$\eqalign{ & \Rightarrow \frac{{{3^{30}} + {3^{60}} + {3^{90}}}}{3} \cr & \Rightarrow {3^{29}} + {3^{59}} + {3^{89}} \cr} $$
$$\eqalign{ & \Rightarrow \frac{{{3^{30}} + {3^{60}} + {3^{90}}}}{3} \cr & \Rightarrow {3^{29}} + {3^{59}} + {3^{89}} \cr} $$
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