单选题 Of 30 applicants for a job, 14 had at least 4 years experience, 18 had degrees, and 3 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?

【正确答案】 E
【答案解析】[解析] 此题可以通过画文氏图来解，如下图所示：
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从图中可以看出，有学位且有4年以上工作经验的申请者就是图中的阴影部分，设有x人，则根据题意可得：3+18+14-x-30→x=5人。