How to get ExpectedHPR=14.4 ? Thanks.

You have been given this probability distribution for the holding-period return for GM stock: Stock of the Economy Boom Normal growth Recession What is the expected variance for GM stock? Probability 0.40 0.40 HPR 30% 11% 10% 0.20 - Select one: A. 246.37% B. 16.13% Variance = [0.40 (30 14.4)2 +0.40 (11 14.4)2 +0.20 (-10 - 14.4)21 = 221.04%. O C. 221.04% D. 14.87% E. 200.00%