Of the 150 employees at company X, 70 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? Select the correct option:
A) 20
B) 40
C) 50
D) 80
E) 100
150 employees   70 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?   150-70= 
<gadget id="calculator">150-70</gadget>
<output>80</output>
80 employees not full time   80-20= 
<gadget id="calculator">80-20</gadget>
<output>60</output>
60 employees not full time who worked over a year   100 employees have worked at company X for at least a year-60 employees not full time who worked over a year= 40 full-time employees of company X have worked at the company for at least a year   ans 40
<result>B</result>
Of the 150 employees at company X, 70 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?