An urn contains four red marbles and five blue marbles. What is the probability of selecting at random, without replacement, two red marbles? A. 16/72
B. 20/72
C. 12/72
D. 20/81
Please show steps.

40 & 50 in the right corner are the complementary angles as when placed in a sum (added together) they make 90°

Ithink if im not mistaking b is -3 but im not a 100% sude

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c