Q.No. 2

Max Marks6

a. A manager of self-service gas station has noticed over a period of six months that 8% of the drivers check windshield washer fluid, 3% check fluid nozzles on the hood, and 2% check both. If a randomly selected driver checked the windshield washer fluid, what is the probability that the fluid nozzles on the hood were also checked?

b. Of the ten computer chips, 4 are defective. What is the probability of selecting three without replacement, only one which is defective?

c. In a certain county 60% of registered voters are Republicans 30% are Democrats 10% are Independents. When those voters were asked about increasing military spending 40% of Republicans opposed it 65% of the Democrats opposed it 55% of the Independents opposed it. What is the probability that a randomly selected voter in this county opposes increased military spending?