On a Saturday night, 20%of all drivers in U.S.A. are under the
influence of alcohol. The probability that a drive under the influence of
alcohol will have an accident is 0.001. The probability that a sober drive
will have an accident is 0.00. if a car on a Saturday night smashed into a
tree, the probability that the driver was under the influence of alcohol is
`3//7`
b. `4//7`
c. `5//7`
d. `6//7`
A. `3//7`
B. `4//7`
C. `5//7`
D. `6//7`