Task: Question Answering
Input (English): Problem: the events a and b are independent, the probability that event a occurs is greater than 0, and the probability that event a occurs is twice the probability that event b occurs. the probability that at least one of events a and b occurs is 8 times the probability that both events a and b occur. what is the probability that event a occurs ?
Options: a. 1 / 12, b. 1 / 8, c. 1 / 6, d. 1 / 3, e. 2 / 3
Output (English): d