Question

Jason inherited a piece of land from his great-uncle. Owners in the area claim that there is a 45% chance that the land has oil. Jason decides to test the land for oil. He buys a kit that claims to have an 80% accuracy rate of indicating oil in the soil. What is the probability that the land has oil and the test predicts it? 0.09 0.11 0.36 0.44

Answer 1

0.36

Got it right on the test

Answer 2

The answe is 0,36 or 36%

The probability of having oil is 45% or 0,45
The probability of the test predicts it is 80% or 0,80
The probability of having oil and the test predicts it is 0,45 x 0,80
= 0,36