Answer
a.P(better off or high school)= $\frac{140+450+420}{2000}$ +$\frac{450+250+300}{2000}$ - $\frac{450}{2000}$ =0.78
b.P(more than high school or worse off)=$\frac{420+110+70}{2000}$ +$\frac{200+300+70}{2000}$ - $\frac{70}{2000}$ = 0.55
c. P(better off or worse off)=$\frac{140+450+420}{2000}$ +$\frac{200+300+70}{2000}$ = 0.79
Work Step by Step
no.