SELECT avg(T1.age) FROM student AS T1 JOIN lives_in AS T2 ON T1.stuid  =  T2.stuid JOIN dorm AS T3 ON T3.dormid  =  T2.dormid WHERE T3.student_capacity  =  (SELECT max(student_capacity) FROM dorm)
Find the average age of students who are living in the dorm with the largest capacity.
SELECT avg ( T1.age ) FROM student AS T1 JOIN lives_in AS T2 ON T1.stuid = T2.stuid JOIN dorm AS T3 ON T3.dormid = T2.dormid WHERE T3.student_capacity = ( SELECT max ( student_capacity ) FROM dorm )
select avg ( t1 . age ) from student as t1 join lives_in as t2 on t1 . stuid = t2 . stuid join dorm as t3 on t3 . dormid = t2 . dormid where t3 . student_capacity = ( select max ( student_capacity ) from dorm )
Find the average age of students who are living in the dorm with the largest capacity .