Consider a risky portfolio. The cash flow derived from the portfolio

at the end of year $3$ will be either $$50,000,60,000,80,000$ or

$$110,000,$ with equal probabilities of $0\mathrm{.}25.$ The alternative riskless

investment in T$-$bills pays $5\%.$ What is the expected cash flow at

the end of year $3$ for this risky portfolio?

$$68,000$

$$90,000$

$$75,000$

$$83,000$

$$80,000$