Of 45 applicants for a job, 28 had at least 5 years of prior work experience, 24 had advanced degrees, and 20 had at least 5 years of prior work experience and advanced degrees. How many of the applicants had neither 5 years of prior work experience nor advanced degrees? Choose the correct answer:
A) 9	B) 13	C) 18	D) 20	E) 23
Had advanced degrees and 5 years work experience: 20   Only had 5 years work experience: 28-20= 
<gadget id="calculator">28-20</gadget>
<output>8</output>
8   Only had advanced degrees: 24-20= 
<gadget id="calculator">24-20</gadget>
<output>4</output>
4   45-20-8-4= 
<gadget id="calculator">45-20-8-4</gadget>
<output>13</output>
13   Answer: 13
<result>B</result>
Of 45 applicants for a job, 28 had at least 5 years of prior work experience, 24 had advanced degrees, and 20 had at least 5 years of prior work experience and advanced degrees. How many of the applicants had neither 5 years of prior work experience nor advanced degrees?