Probability	Expected Return
0.3	-10%
0.4	5%
0.3	15%

If IBM has the probability distribution shown in the table above, what is IBMs standard deviation?

Instruction: Type your answer in the unit of percentage point, and round to three decimal places. E.g., if your answer is 0.0106465 or 1.06465%, should type ONLY the number 1.065, neither 0.0106465, 0.0106, nor 1.065%, because I already have percentage sign at the end of the problem. Otherwise, Blackboard will treat it as a wrong answer.