#### Answer

a. $0.198$
b. $0.188$
c. $0.498$

#### Work Step by Step

Sum up all rows and columns.
Total =623
a. Given that the death was after 2000, what is the probability that it occurred under a tree?
total death after 2000 = 388, $p=(35+42)/388=0.198$
b. Find the probability that the death was from camping or being outside and was before 2001.
$p=117/623=0.188$
c. Find the probability that the death was from camping or being outside given that it was before 2001.
total death before 2001=235, $p=117/235=0.498$