219,779 views
27 votes
27 votes
I need help to find the missing probability. P(A and B)=33/100P(B/A)=3/5P(A)=?

User Sandah Aung
by
2.6k points

1 Answer

14 votes
14 votes

we are given the probability of A and B and the conditional probability B/A. We can use the following formula to determine the probability of A:


P(A\wedge B)=P(A)* P((B)/(A))

Solving for the probability of A:


P(A)=(P(A\wedge B))/(P((B)/(A)))

Replacing the known values:


P(A)=((33)/(100))/((3)/(5))

Solving the operations:


P(A)=0.55

Therefore the probability of A is 55%

User Karl Doenitz
by
2.6k points
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