Auritie Lope is considering the purchase of an asset having the following cash flows:

$\backslash$table$[[\frac{Ki}{?},$Prob.$],[,\mathrm{.}20],[$$$900,30],[$$$1100,30],[-$$$400,\mathrm{.}20]]$

What is the standard deviation of the asset's cash flows?

$$801$

$$630$

$$548$

$$496$

none of the above are correct