Taken directly from https://www.ontariouniversitiesinfo.ca/universities/york/offers-of-admission
York’s policy on repeated courses: Repeated courses are accepted. Admissions will consider the course with the highest grade, which may not necessarily be the most recently taken course. The Schulich School of Business reserves the right to review each situation on an individual basis.
York’s policy on failed courses: Failed courses will be considered. Admissions will review the course with the highest grade.