Ms. McClaine drew a box plot to represent her students' scores on a mid- term test. Barbara earned 81 on the test. Describe how the scores of Barbara's classmates compared to Barbara's score. A. about 3/4 scored higher;
about 1/2 scored lower

B. about 3/4 scored higher ; about 1/4 scored lower

C. about 1/2 scored higher ; about 1/2 scored lower

D. about 1/4 scored higher ; about 3/4 scored lower Selection

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