1,334 prompts matching "Give me common mistakes students make in permutations and combinations"
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Worked Example: The total moment of three parallel forces about one end
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Learn: The algebraic sum of moments when the senses differ
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WAEC Prep: Using concurrence to locate an unknown line of action
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WAEC Prep: Why three non-parallel forces in equilibrium must be concurrent
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Explain Back: Locating the point of concurrence on a diagram
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Quiz: A rod resting against a wall, and the concurrence of its three forces
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WAEC Prep: A particle in equilibrium on a smooth inclined plane
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WAEC Prep: A knot held in equilibrium by three strings
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WAEC Prep: The conditions for a particle under three forces to be in equilibrium
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Explain Back: A particle hanging from two strings set at different angles
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WAEC Prep: A lamp hanging from two wires, solved by Lami's theorem
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WAEC Prep: The statement of Lami's theorem
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Worked Example: Matching each force to the sine of the angle opposite it
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Learn: Finding two unknown forces by Lami's theorem
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Spot My Mistake: When Lami's theorem may be used, and when it may not
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Explain Back: A probability distribution table for a discrete random variable
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WAEC Prep: Expanding p plus q, all to the power n, as a probability model
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WAEC Prep: The binomial expansion of a plus b all to the power n
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Worked Example: Finding a particular term of a binomial expansion
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Learn: Finding the coefficient of a stated power in an expansion
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