2.107 Pollution of the rivers in the United States has been a problem for many years. Consider the following events: A= (The river is polluted.} {A sample of water tested detects pollution.} C= {Fishing permitted.} Assume P(A) = 0.3. P(B|A) = 0.75, P(B|A') = 0.20, P(C|ANB) = 0.20, P(C|A'nB) = 0.15, P(C\ANB') = 0.80, and P(C|A'n B') = 0.90. (a) Find P(ANBNC). (b) Find P(B' nc). (c) Find P(C). (d) Find the probability that the river is polluted, given that fishing is permitted and the sample tested did not detect pollution. %3D

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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2.107 Pollution of the rivers in the United States has
been a problem for many years. Consider the following
events:
A= (The river is polluted.}
{A sample of water tested detects pollution.}
C= {Fishing permitted.}
Assume P(A)
= 0.3. P(B|A) = 0.75, P(B|A') = 0.20,
P(C|ANB) = 0.20, P(C|A'nB) = 0.15, P(C\ANB') =
0.80, and P(C|A'n B') = 0.90.
(a) Find P(ANBNC).
(b) Find P(B' nc).
(c) Find P(C).
(d) Find the probability that the river is polluted, given
that fishing is permitted and the sample tested did
not detect pollution.
%3D
Transcribed Image Text:2.107 Pollution of the rivers in the United States has been a problem for many years. Consider the following events: A= (The river is polluted.} {A sample of water tested detects pollution.} C= {Fishing permitted.} Assume P(A) = 0.3. P(B|A) = 0.75, P(B|A') = 0.20, P(C|ANB) = 0.20, P(C|A'nB) = 0.15, P(C\ANB') = 0.80, and P(C|A'n B') = 0.90. (a) Find P(ANBNC). (b) Find P(B' nc). (c) Find P(C). (d) Find the probability that the river is polluted, given that fishing is permitted and the sample tested did not detect pollution. %3D
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