The answer is (3) 3. There are 3 even number in the cube: 2, 4, 6. And one tail in the penny tossed. So the total elements are 3*1=3.
The solution is when f(x) and g(x) have the same value in the table.
When x is -2 both values are 4 and When x is -1 both values are 2
The answers would be -2 and -1