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<!-- /* Font Definitions */@font-face {font-family:宋体; mso-font-charset:80; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:1 0 16778254 0 262144 0;}@font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:3 0 0 0 1 0;} /* Style Definitions */p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; mso-pagination:none; font-size:10.5pt; mso-bidi-font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:宋体; mso-bidi-font-family:"Times New Roman"; mso-font-kerning:1.0pt;}@page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;}div.Section1 {page:Section1;}-->有一道集合的题总共4中课E,J,P,S,说选J课程的都选了E课程,选P课程的有7个人选了E课程,有15个人选了J课程,35人选了P课程,13个人选了S课程。问选了3种课程的学生最多可能是多少个
这种题,卫士图怎么解?
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