Of the 150 employees at company X, 50 are full-time, and 100 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?	Choose the correct answer.
A) 20 B) 30 C) 50 D) 80 E) 100
150 employees   50 are full-time   100 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?   150-50= 
<gadget id="calculator">150-50</gadget>
<output>100</output>
100 employees not full time   100-20= 
<gadget id="calculator">100-20</gadget>
<output>80</output>
80 employees not full time who worked over a year   100 employees have worked at company X for at least a year-80 employees not full time who worked over a year= 20 full-time employees of company X have worked at the company for at least a year   ans 20
<result>A</result>
Of the 150 employees at company X, 50 are full-time, and 100 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?