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 ?
n0 = 0.0
n1 = 8.0
t0 = 1.0 + 2.0
t1 = n1 * 2.0
t2 = t1 + 2.0
t3 = t0 / t2
answer = t3 * 2.0
print(answer)