1 Considering the world economic outlook for the coming year and estimates of sales and earning for the pharmaceutical industry, you expect the rate of return for GlaxoSmithKline common stock to range between -20 per cent and +40 per cent with the following probabilities. Probability 0.10 0.15 0.20 0.25 0.20 0.10 Possible returns -0.20 -0.05 0.10 0.15 0.20 0.40 calculate the expected rate of return E(R GlaxoSmithKline. or