A teacher has a box of crayons that contains 6
red, 6 blue, 6 green and 6 purple crayons.
Heather picks a crayon out of the box and does
not replace it. She then picks a second crayon.
What is the probability that the first crayon is
purple and the second crayon is purple?

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.