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Q.

What is the average of 121, 123, 125, 127, 129, 131, 133 ?

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a

123

b

127

c

125

d

129

answer is B.

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Detailed Solution

All are consecutive odd numbers starting from 121 to 133. Total numbers are 7. If total numbers are odd then average is middle number.

as n is odd, avg = 127

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What is the average of 121, 123, 125, 127, 129, 131, 133 ?