Consider a random point (X,Y)(X, Y)(X,Y) in the unit square [0,1]×[0,1][0, 1] \times [0, 1][0,1]×[0,1]. What is P(X+Y<0.5∣X<0.5)P(X+Y < 0.5 | X < 0.5)P(X+Y<0.5∣X<0.5)?
0.250.250.25
0.50.50.5
0.750.750.75
0.1250.1250.125