A company has 50 employees, of which 22 studied accounting, 15 studied finance and 14 studied marketing. Ten employees have done just two courses and only one made ​​the three courses. How many employees have no training? Pick:
A) A)0
B) B)9
C) C)10
D) D)11
E) E)26
Total employees=50   studied accounting=22   studied finance=15   studied marketing=14   10 employees have been double counted and one employee has been counted thrice.   Therefore employees who have received training=22+15+14-10-(2*1)   =51-12= 
<gadget id="calculator">51-12</gadget>
<output>39</output>
39   Employees with no training=50-39= 
<gadget id="calculator">50-39</gadget>
<output>11</output>
11   Ans=11
<result>D</result>
A company has 50 employees, of which 22 studied accounting, 15 studied finance and 14 studied marketing. Ten employees have done just two courses and only one made ​​the three courses. How many employees have no training?