>maths help! +rep.

[Teabags]

Just a quick question.
E - sum of.

E(x-10) = 208
E(x-10)^2=2716

Prove Ex^2=8876

Thanks!

[Teabags]

Got it sorted now ;l wasn't thinking.

[Andii]

Is x like 25 ??

[Teabags]

Is x like 25 ??

I hadn't explained it properly. Needed to know that 20=n >so you can workout Variance + sd.

Really was having a blank moment.
The answer wasn't 25 I don't think, but that's for giving it a go anyway!