To pass most Study.com courses, you need an overall score of 70% or higher when all graded components are combined — not necessarily 70% on the final exam alone.
For example, in a typical course where chapter tests make up two-thirds of your grade and the final exam counts for one-third, doing well on your chapter tests can help balance a lower final exam score.
You can always check the exact grading breakdown for your course under the Grading Policy or Syllabus section on Study.com.