To calculate comparisons where p is probability of a strong economy and 1-p that of a weak economy, if S=strong payoff and K the weak payoff, the comparison figure is pS+(1-p)K:
V: Certificate of deposit: 0.4*6000+0.6*6000=6000
W: Office complex: 0.4*15000+0.6*5000=6000+3000=9000
X: Land speculation: 0.4*33000-0.6*17000=13200-10200=3000
Y: Technical school: 0.4*5500+0.6*10000=2200+6000=8200
W, Office complex, gives the best investment option.