Of 30 applicants for a job, 12 had at least 4 years' experience, 19 had degrees, and 6 had less than 4 years' experience and did not have a degree. How many of the applicants had at least 4 years' experience and a degree?
Select the correct option.
A) 14
B) 13
C) 9
D) 7
E) 5
set A : people with more than 4 years exp   set B : people with degree   AUB = total - (less than 4 exp and no degree)   AUB = 30-6= 
<gadget id="calculator">30-6</gadget>
<output>24</output>
24   AUB= A + B - AiB   AiB = 19+12-24= 
<gadget id="calculator">19+12-24</gadget>
<output>7</output>
7   Answer 7
<result>D</result>
Of 30 applicants for a job, 12 had at least 4 years' experience, 19 had degrees, and 6 had less than 4 years' experience and did not have a degree. How many of the applicants had at least 4 years' experience and a degree?