In a large university, 13.5% of the students take economics, 24.7% of the students take statistics and 11.7% take economics and statistics. PLEASE HELP ME

What is the probability that a randomly selected student didn’t take either class?

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .

The correct answer is x=-1, usually the answer would be y=something but because there is no slope or y intercept, the answer is x=-1