Assume breast cancer affects 0.001 of the female population between 45

Assume breast cancer affects 0.001 of the female population between 45 and 55 years of age. the test results are true positive and false positive. if the mammograms are 0.91 accurate detecting cancer (true positive rate). And 0.91 accurate for people who do not have cancer (true negative rate). compute the probability that a female btwn 45 and 55 who test positive for cancer. in 3 decimal places.