CAPM (Certified Associate in Project Management) Practice Exam

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What is the formula for calculating total float?

  1. late finish - early start

  2. late finish - early finish

  3. early finish - late start

  4. early start - late finish

The correct answer is: late finish - early finish

The formula for calculating total float is late finish - early finish. Option A, late finish - early start, would give the total duration but it does not reflect the amount of time that the project can be delayed without affecting the project deadline. Option C, early finish - late start, would give a negative float value which is not possible. Option D, early start - late finish, also gives a negative float value and does not account for the late finishing date. Therefore, option B, late finish - early finish, is the correct formula for calculating total float.