Question

Events A and B are independent. Find the missing probability.
P(b)=9/20,p(a|b)=1/5,p(a)=?

Answer 1

Answer:

4/9

Step-by-step explanation:

since they are independent

p(ab)=p(a/b)=p(a)*p(b)

1/5=p(a)*9/20

p(a)=$\frac{\frac{1}{5} }{\frac{9}{20} }  = 4/9$