Two Conditional Probability Examples (what's the difference???)

We investigate two basic conditional probability examples that are ALMOST identical but slightly different. We look at the probability of two children both being girls given either that we are told one of the two kids is a girl, or that we are told the oldest of the two kids is a girl. Conditional Probability Formula: P(A|B) = P(A and B)/P(B) ►FULL DISCRETE MATH PLAYLIST:    • Discrete Math (Full Course: Sets, Logic, P...   OTHER COURSE PLAYLISTS: ►CALCULUS I:    • Calculus I (Limits, Derivative, Integrals)...   ► CALCULUS II:    • Calculus II (Integration Methods, Series, ...   ►MULTIVARIABLE CALCULUS (Calc III):    • Calculus III: Multivariable Calculus (Vect...   ►VECTOR CALCULUS (Calc IV):    • Calculus IV: Vector Calculus (Line Integra...   ►DIFFERENTIAL EQUATIONS:    • How to solve ODEs with infinite series | I...   ►LINEAR ALGEBRA:    • Linear Algebra (Full Course)   OTHER PLAYLISTS: ► Learning Math Series    • 5 Tips To Make Math Practice Problems Actu...   ►Cool Math Series:    • Cool Math Series   BECOME A MEMBER: ►Join:    / @drtrefor   MATH BOOKS & MERCH I LOVE: ► My Amazon Affiliate Shop: https://www.amazon.com/shop/treforbazett SOCIALS: ►Twitter (math based):   / treforbazett   ►Instagram (photography based):   / treforphotography