On average, how old are the members in the club "Hopkins Student Enterprises"?
SELECT avg(t3.age) FROM club AS t1 JOIN member_of_club AS t2 ON t1.clubid  =  t2.clubid JOIN student AS t3 ON t2.stuid  =  t3.stuid WHERE t1.clubname  =  "Hopkins Student Enterprises"
Ortalama olarak, "Hopkins Student Enterprises" kulübündeki üyeler kaç yaşında?