Probability Basics ​​​​​(GMAT Course – Problem Solving & Data Sufficiency Math Concepts)

Probability Basics ​​​​​(GMAT Course, Segment 2 – Problem Solving & Data Sufficiency Math Concepts)
Probability of a Single Event
P = desired outcomes / possible outcomes

Probability for Multiple Independent Events
P₁ × P₂ = Pboth

Probability for Multiple Outcomes of a Single Event
P₁ + P₂ = Peither

Probability for Complex Event Outcomes
Total = Group 1 + Group 2 – Overlap + Neither

Probability for “At Least” Outcomes of Multiple Events
Pat least = 1 – Pexception(s)

0:00 Introduction
0:22 Probability Basics
7:48 Example 1
13:04 Example 2