Final answer:
Investing in the blue chip stock like Microsoft would be classified as a fair bet. However, a risk-averse person would not make this investment due to the high risk involved.
Step-by-step explanation:
To determine whether investing in the blue chip stock like Microsoft is a fair bet or not, we need to calculate the expected value. The expected value is the sum of the product of each outcome and its respective probability. For this investment, the expected value can be calculated as: (0.25 * $30,000) + (0.75 * -$10,000) = $7,500 - $7,500 = $0. Since the expected value is $0, it can be classified as a fair bet.
A risk-averse person would not make this investment. The reason is that a risk-averse person prefers to avoid or minimize risk, and investing in a stock with a 75% chance of decreasing wealth is considered too risky. They would opt for investments with more stable returns and lower risk.