Master Averages, Weighted Averages, Mixtures and Work Rate
Автор: Leonard Nwosu
Загружено: 2026-01-15
Просмотров: 10
Описание:
In this session, you’ll learn:
✅ Average & missing value problems
✅ Weighted averages (why you can’t “average the averages”)
✅ Alligation for mixtures (ratio method)
✅ Work rate basics (Rate = Work ÷ Time)
✅ Combined work (rates add)
✅ Pipes filling vs emptying (positive vs negative rates)
✅ Fast methods, common traps, and test shortcuts
📌 Key Formulas You Must Know
• Average = Sum ÷ Count
• Weighted Avg = (w₁x₁ + w₂x₂ + …) ÷ (w₁ + w₂ + …)
• Alligation Ratio = (C₂ − Cₘ) : (Cₘ − C₁)
• Rate = Work ÷ Time
• Two workers together: Time = (a×b) ÷ (a+b)
• Pipes: Net Rate = (sum of inlet rates) − (sum of outlet rates)
🎯 Perfect for:
GMAT Quant | NMAT Quant | GRE Quant | SAT/IELTS Math refreshers
📲 Need more practice questions or private coaching?
Leo Nwosu — WhatsApp/Call: 08032710570
#GMAT #NMAT #GRE #Quant #Averages #Mixtures #Alligation #WorkRate #PipesAndCisterns #MathTutorial #ExamPrep
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