Of the 200 employees at company X, 80 are full-time, and 150 have worked at company X for at least a year. There are 20 employees at company X who aren’t full-time and haven’t worked at company X for at least a year. How many full-time employees of company X have worked at the company for at least a year?
Options.
A) 20
B) 30
C) 50
D) 80
E) 100
200 employees   80 are full-time   150 have worked at company X for at least a year   20 employees at company X who aren’t full-time and haven’t worked at company X for at least a year.   How many full-time employees of company X have worked at the company for at least a year?   200-80= 
<gadget id="calculator">200-80</gadget>
<output>120</output>
120 employees not full time   120-20= 
<gadget id="calculator">120-20</gadget>
<output>100</output>
100 employees not full time who worked over a year   150 employees have worked at company X for at least a year-100 employees not full time who worked over a year= 50 full-time employees of company X have worked at the company for at least a year   C. 50
<result>C</result>
Of the 200 employees at company X, 80 are full-time, and 150 have worked at company X for at least a year. There are 20 employees at company X who aren’t full-time and haven’t worked at company X for at least a year. How many full-time employees of company X have worked at the company for at least a year?