Probabilidad: Problema Resuelto (Unión de Sucesos y Suceso Contrario)

   • PROBABILIDAD DESDE CERO | ESO  BACHILLERAT...   In this video, we solve a probability problem step by step, applying the formula for the union of events and the complementary event. 📌 Problem statement: In a class, 80% pass Biology, 70% pass Mathematics, and 60% pass both Biology and Mathematics. If a student is chosen at random: a) What is the probability that they pass at least one of the subjects? b) What is the probability that they fail both subjects? In this exercise you will learn to: ✔️ Apply the formula for the probability of the union of events ✔️ Correctly interpret P(A ∪ B) ✔️ Calculate the complementary event ✔️ Solve probability problems step by step 📚 This video is part of the BASIC PROBABILITY playlist, which explains the fundamental concepts of probability from scratch: random experiment, sample space, events, operations with events, Laplace's law, and probability calculations. In this video you will also learn to correctly use the formula for the probability of the union of events P(A ∪ B) = P(A) + P(B) − P(A ∩ B), something very common in probability exercises and university entrance exam-type problems. #probability #solvedproblems #probabilityexercises #unionofevents #basicprobability #mathematics #statistics #highschool #secondaryschool #universityentranceexam