Posted by **Carol** on Tuesday, June 4, 2013 at 12:26pm.

Find the sum of the sequence.

38+39+40+41+...+137

The sum is?

My answer 175(99)= 17,325

Is this correct? If not how do I get the correct answer?

- Math for Educators -
**bobpursley**, Tuesday, June 4, 2013 at 12:41pm
no, no.

first: there are 100 terms here.

second, how did you get 175 as the mean? 175 is greater than the highest term? The mean is 175/2

the mean is 137+38 divided by 2

one hundred terms x mean=below

sum= 100(38+137)/2=175*50=8750

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