If P(A)=x,P(B)=yP(A) = x, P(B) = yP(A)=x,P(B)=y, and P(A∣B)=P(B∣A)P(A|B) = P(B|A)P(A∣B)=P(B∣A), what is the relationship between xxx and yyy?
x=yx=yx=y
x+y=1x+y=1x+y=1
xy=1xy=1xy=1
x2=y2x^2=y^2x2=y2