3.

A Canadian drug company is developing a new pregnancy test for use on an outpatient basis. The company uses the test on 155 pregnant women and obtains 95 positive test results. The company uses the test on 45 non-pregnant women and obtains 25 negative test results. What is the negative predictive value of this test ?

(A) 0,705 (B) 0,294 (C) 0,529 (D) 0,235 (E) 0,775

(please show the steps)