query.cs

model.SectionDetails = (from section in repositoryFactory.SectionRepository.Queryable
    let sequence = section.Course.CrossListedCourse == null ? section.Sequence : string.Format("{0} ({1} {2})", section.Sequence, section.Course.Subject, section.Course.CourseNumb)
    let students = (decimal)section.ClassTimes.SelectMany(a => a.Students).Select(a => a.LoginId).Distinct().Count()
    let responses = (decimal)section.ClassTimes.SelectMany(a => a.ClassTimeEvaluations).SelectMany(a => a.EvaluationResponses).Count()
    let evals = section.ClassTimes.SelectMany(a => a.ClassTimeEvaluations).Count()
    let instructors = section.ClassTimes.SelectMany(a => a.Instructors)
    where section.Course == course || section.Course.CrossListedCourse == course
    select new SectionDetail() { SectionId = section.Id, Sequence = sequence, 
        Students = (int)students, ResponseRate = ((responses)/(students*evals))*100,
        InstructorList = instructors}
   ).ToList();