Nathan had an infection, and his doctor wanted him to take penicillin. Because Nathan’s father and paternal grandfather were allergic to penicillin, Nathan has a 75% chance of having the same allergy. The doctor performed a skin test to see whether Nathan would react to it. The test is 98% accurate. What is the probability that Nathan is not allergic to penicillin and the test predicts it?

Question

hippoharry · Answer

25% chance not have the allergy . the test is 98% accurate . 
so , 0.25 x 0.98 = 0.2450 .
the answer is 0.9423

hippoharry · Answer

jk the answer is 0.2450