# Thread: find probability of a randomly selected driver

1. ## find probability of a randomly selected driver

Suppose that the probability that a driver is a male, and has at least one motor vehicles accident during a one-year period is 0.12. Suppose that the corresponding probability for a female is 0.06. What is the probability of a randomly selected driver having at least one accident during the next 12 months?

2. Originally Posted by nikie1o2
Suppose that the probability that a driver is a male, and has at least one motor vehicles accident during a one-year period is 0.12. Suppose that the corresponding probability for a female is 0.06. What is the probability of a randomly selected driver having at least one accident during the next 12 months?
0.12 + 0.06

(A tree diagram makes this very clear).

3. how do i know to just add them. i thought i needed a sample space value . i was going to do P(MuF)= P(M) +P(F) -P(M^F) and i didnt know how to find their intersection

4. Originally Posted by nikie1o2
how do i know to just add them. i thought i needed a sample space value . i was going to do P(MuF)= P(M) +P(F) -P(M^F) and i didnt know how to find their intersection
That's why I mentioned the tree diagram ....