The average (arithmetic mean) of 3^{30} , 3^{60} and 3^{90} is

Correct Answer is : 329+359+389

SSC CGL Tier II 12 Apr 2015 Paper

Question : 80 of 100

Marks: +1, -0

The average (arithmetic mean) of

3^{30} , 3^{60}

and

3^{90}

Solution:

(3) Arithmetic mean

= {3^{30}+3^{60}+3^{90}}/{3}

=3^{29}+3^{59}+3^{89}

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