Скачать или смотреть Probability Basics: Disjoint Events vs. Set Difference Explained

In this walk-through we tackle five classic probability & set-theory questions that students always confuse:
1️⃣ Are “10th-grader” and “boy” disjoint events? (Spoiler: NO – a 10th-grade boy kills both events at once!)
2️⃣ Spotting disjoint sets when the numbers overlap.
3️⃣ Quick visual trick for A – B (set minus).
4️⃣ What “complement of A” really means in a sample-space diagram.
5️⃣ Rolling a fair die: union of “odd” with “even ≠ 2”.
By the end you’ll know the difference between disjoint vs. overlapping events, how to read Venn-shaded regions, and why “union” is just “throw everything in one bucket”. Grab your pen, pause to work each mini-question, then hit play to check your reasoning.

Time-stamps:
00:00 – next set of questions that we have here
00:03 – Q1: Are “10th-grader” (A) and “boy” (B) disjoint?
00:45 – Why “disjoint” means ZERO overlap
01:25 – Q2: P & Q disjoint check (numbers with common element)
02:15 – Rule: disjoint sets share NO elements
02:35 – Q3: Set difference A – B explained
03:05 – Q4: Complement of event A inside sample space S
03:55 – Q5: Die roll – union of “odd” and “even ≠ 2”
04:35 – Final answer recap & goodbye