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Nitesh singh

· started a discussion

· 1 Months ago

Wrong answer (Question: 103693.0 )

According to your formula,I got 33835 answer,then how come you got 38.5. Please explain?

Question:
The average of all the perfect squares up to 100 is: 
Options:
A) 38.5
B) 1000
C) 100         
D) 385
E) None of these
Solution:

Talented Boy

· commented

· 1 Months ago

@Kradle Great bro :)

Kradle

· commented

· 1 Months ago

you're going to find the avg, which means you will divide it by the no. of terms, i.e.=n. That would mean the correct formula for this question will be (n+1)(2n+1)/6 where n=10. Then you will get your answer.

Talented Boy

· commented

· 1 Months ago

average has been asked bro...not only summation...........In questions like this, you need to find firstly sum of fist 100 perfect square by using the formula nx(n+1)x(2n+1)/6 where n=100. Then, to find the average divide it by n=10.
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