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 that there is no oil?

0
0.09
0.11
0.44

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 that there is no oil?

0
0.09
0.11
0.44

anonymous · Answer

I think its 0.11, but I may be wrong. I hope that this helps a little!!!
(Just a Guess)

anonymous · Answer

Can you please explain how you got to that guess? This is the last question on the test and I can't get it wrong (already got one wrong, and it's a 5 question test. Have to get 4 right).

tkhunny · Answer

Have you considered a tree?|dw:1447385436356:dw|

tkhunny · Answer

One for free.  Let's see YOUR work on the next one.

anonymous · Answer

Thanks for explaining it mate. I tried to do a tree myself tbh but I got the numbers confused and such. But I got it right :)

tkhunny · Answer

One piece at a time.  Just build it one piece of information at a time.