A company has 50 employees, of which 22 studied accounting, 15 studied finance and 14 studied marketing. Eight employees have done just two courses and only one made ​​the three courses. How many employees have no training?  Choose the most appropriate option.
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   8 employees have been double counted and one employee has been counted thrice.   Therefore employees who have received training=22+15+14-8-(2*1)   =51-10= 
<gadget id="calculator">51-10</gadget>
<output>41</output>
41   Employees with no training=50-41= 
<gadget id="calculator">50-41</gadget>
<output>9</output>
9   Ans=9
<result>B</result>
A company has 50 employees, of which 22 studied accounting, 15 studied finance and 14 studied marketing. Eight employees have done just two courses and only one made ​​the three courses. How many employees have no training?