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OpenStudy (anonymous):
given that P(A) = .4, P(B) = .8, and P(A and B) = .40; determine P(A/B) ***the / is a straight line in the problem, not slanted
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OpenStudy (a_clan):
p(A|B) = p(A and B)/p(B)
OpenStudy (anonymous):
so the answer is .5?
OpenStudy (a_clan):
yes
OpenStudy (anonymous):
yay! thank u so much! can u help me with another one?
OpenStudy (a_clan):
will try
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OpenStudy (anonymous):
ok thanks, it is... if P(A or B) = .06, P(A) = .03, and P(B) = .07; determine P(A and B)
OpenStudy (a_clan):
P(A or B) = P(A) + P(B) - P(A and B) So P(A and B) = P(A) + P(B) -P(A or B)
OpenStudy (anonymous):
so .04?
OpenStudy (a_clan):
right
OpenStudy (anonymous):
cool, thanks a bunch
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