Question 1119060
a. This would be 0.25*0.35=0.0875.
b. At least one would be 1- probability of neither, the latter probability is 0.75*0.65=0.4875
The answer is 1-0.4875=0.5125
c. This would be the sum of (0.25*0.65) and (0.35*0.75)=0.1625+0.2625=0.4250
d. This would be 0.65*0.75=0.4875 from above
a+c+d=1, which covers the possibilities of 0,1,2.