Amedical center studied 1000 women with a palpable breast mass. All of the women underwent biopsy (gold standard diagnostic procedure) and mammography procedures. Of 600 women who had a biopsy positive for cancer, 510 also had a positive mammogram. A total of 400 women had a negative biopsy. Of these 400 women, 20 had a positive mammogram

The probability that women who tested positive on mammography actually have breast cancer is:

	A.	20/530 or 4%
	B.	510/600 or 85%
	C.	90/470 or 19%
	D.	90/600 or 15%
	E.	510/530 or 96%