Ashipment of 12 smartphones contains 7 with cracked screens. if sold in a random order, what is the probability that exactly 4 of the first 7 sold have cracked screens?

Which lines are parallel? justify your answer. lines p and q are parallel because same side interior angles are congruent. lines p and q are parallel because alternate exterior angles are congruent lines l and m are parallel because same side interior angles are supplementary lines l and m are parallel because alternate interior angles are supplementary.