Let X1,X2,X3X_1, X_2, X_3X1,X2,X3 be i.i.d. U(0,1)U(0, 1)U(0,1). What is P(X1<X2<X3)P(X_1 < X_2 < X_3)P(X1<X2<X3)?
1/61/61/6
1/31/31/3
1/21/21/2
1/41/41/4