Answer
S= { HHH,HHi,Hii,HiH,iHH,iiH,iHi,iii} H = Healthy , i = ill
a. { HHi , iHH,HiH } = $\frac{3}{8}$ *100% = 37.5%
b. {iiH,Hii,iii,iHi} = $\frac{4}{8}$ *100% = 50%
c. {HHH} = $\frac{1}{8}$ = 12.5%
Work Step by Step
S= { HHH,HHi,Hii,HiH,iHH,iiH,iHi,iii} H = Healthy , i = ill
a. { HHi , iHH,HiH } = $\frac{3}{8}$ *100% = 37.5%
b. {iiH,Hii,iii,iHi} = $\frac{4}{8}$ *100% = 50%
c. {HHH} = $\frac{1}{8}$ = 12.5%