💊 CRF-DF 2026 QUADRIX | Raciocínio Lógico – Gabarito Comentado | Assistente Administrativo

If you took the Logical Reasoning exam for the Regional Pharmacy Council of the Federal District (CRF-DF), for the position of Administrative Assistant I, administered by QUADRIX in 2026, this video provides a complete, detailed, and 100% commented correction of items 15 to 24. Here at Matemática Bruta, you can follow the step-by-step solution, with direct explanations and a focus on the QUADRIX style: sets and Venn diagrams, proportions, compound rule of three (machines and production), line in a plane (slope and intercept), arithmetic mean, conditional probability, and negation of propositions with connectives. In practice, it's the commented answer key for the CRF-DF 2026 (QUADRIX) exam. 💚 Support Bruta Math Become a member and get exclusive benefits 👉    / @matematicabruta   ❤️ Subscribe and activate the 🔔 https://www.youtube.com/@matematicabr... ⏱ VIDEO INDEX (fill in the times after uploading the video) 00:00 Introduction 01:23 Items 15 and 16 05:43 Items 17, 18, 19 and 20 17:04 Items 21, 22 and 23 28:00 Item 24 📌 Items solved in this video (CRF-DF 2026 – QUADRIX) Of 300 pharmacists interviewed, 180 like football, 150 like volleyball and 50 like both sports. Based on this hypothetical situation, judge the following items. 15. The number of pharmacists who like at least one of these sports is equal to 280. 16. Maintaining the proportions of the situation at hand, if the number of pharmacists interviewed were x, then the number of people who like only volleyball would be equal to x/2. A factory used identical machines to assemble solar panels. Thus, it was known that 4 machines operating for 6 hours a day could produce a total of 120 panels. Based on this hypothetical situation and considering that the performance of the machines is constant and that there is no waste of material, judge the following items. 17. The ratio between the number of machines and the quantity of panels produced per day, maintaining the 6 hours of work, is 1:30. 18. If the factory decides to operate with only 3 machines, maintaining the same 6-hour workday, daily production will drop to 80 panels. 19. If the factory wants to maintain production of 120 panels, but needs to deactivate one machine, the remaining machines should operate 8 hours a day. 20. If 5 machines operate for 2 days for 7 hours, the number of panels produced will be greater than 360. From 5 individuals, their respective heights and weights were obtained, as presented in the following table. These data were plotted on a graph, where weight (p) is the horizontal axis and height (a) is the vertical axis. Based on this hypothetical situation and the information presented, judge the following items. 21. The line that intersects the weights and heights of individuals 1 and 5, respectively, is the line a = 1.4p + 75. 22. The average weight of these individuals is less than 75 kg. 23. The probability that the height of a randomly chosen individual is less than 170 cm given that their weight is greater than or equal to 65 kg is equal to 1/4. Regarding propositions and connectives, judge the following item. 24. Considering p, q, and r as simple propositions, the negation of the compound proposition p → (s ∨ t) will be the proposition ~p ∨ ~(s ∨ t). 📚 Topics covered (QUADRIX standard) • Sets (union/intersection) and Venn; • Proportionality; • Compound rule of three (production); • Analytical geometry: line in the plane; • Arithmetic mean; • Conditional probability; • Propositional logic: conditional, negation, and De Morgan. ⚙️ Complete Course on Logical-Mathematical Reasoning by Exam Board: FCC: 👉    • FCC - CURSO DE RACIOCÍNIO LÓGICO para CONC...   FGV: 👉    • FGV - CURSO DE RACIOCÍNIO LÓGICO para CONC...   VUNESP: 👉    • VUNESP - CURSO DE RACIOCÍNIO LÓGICO para C...   AOCP: 👉    • 🧠 AOCP - CURSO DE RACIOCÍNIO LÓGICO para C...   🎯 Playlists to continue studying: 📘 FCC — Mathematical Logical Reasoning:    • FUNDATEC | Raciocínio Lógico Matemático – ...   📘 FGV:    • FGV | Raciocínio Lógico Matemático – Prova...   📘 VUNESP:    • VUNESP | Raciocínio Lógico Matemático – Pr...   📘 AOCP:    • INSTITUTO AOCP | Raciocínio Lógico Matemát...   📘 QUADRIX:    • QUADRIX | Raciocínio Lógico Matemático – P...   📘 CEBRASPE:    • CEBRASPE | Raciocínio Lógico Matemático – ...   #crfdf #crfdf2026 #quadrix #quadrix2026 #administrativeassistant #administrativeassistanti #logicalreasoning #mathematics #solvedexam #answerkey #commentedquestions #rawmathematics #sets #Venndiagram #proportionality #ruleofthree #conditionalprobability #arithmeticmean #analyticgeometry #equationofaline #propositionallogic