Owen knows he only has three pencils in his backpack , and they are all yellow. He reaches into his backpack without looking and takes out a pencil . What is the probability that the pencil was yellow

100% cause owen only has 3 yellow pencils

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq