Final answer:
The probability that a driver with at least one collision in the past year is a Teen driver is 7%.
Step-by-step explanation:
The probability that a driver with at least one collision in the past year is a Teen driver can be found by using conditional probability. We can use the formula:
P(Teen|Collision) = P(Teen ∩ Collision) / P(Collision)
Given that Teen drivers make up 7% of all drivers and the collision rate for all drivers is 15%, we have:
P(Teen|Collision) = (0.07 * 0.15) / 0.15 = 0.07
Therefore, the probability that a driver with at least one collision in the past year is a Teen driver is 0.07 or 7%.