Answer:
50%
Explanation:
Though it doesn't visually match what you'd expect, the numbers show the areas of the sections. It's asking you to compare the number inside the green circle to all numbers outside it added up. In this case, the green circle, which represents event A, has an area of 18, the white circle, which represents event B, has an area of 12, and the box around them, which represents neither event occurring, has an area of 6.
6 + 12 = 18, which is equal to the green circle's area, which means there is an equal chance for event A to occur as there is event B to occur or neither to occur.
Also, please clean your screen.