Emily has six black marbles, ten clear marbles, and four blue marbles in a bag. If she picks one at random, what is the probability that she will pick a black marble?

Areflection of shape i across the y-axis, followed by a , and then a translation left 6 units and down 4 units confirms congruence between shape i and shape ii. alternatively, a of shape ii about the origin, followed by a reflection across the y-axis, and then a translation right 4 units and up 6 units confirms congruence between shape ii and shape i.