1,328 prompts matching "Practice: The probability of drawing one ball of each colour"
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Explain Back: The forces acting on a body hanging from two strings
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Explain Back: The order in which the forces are drawn round the triangle
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WAEC Prep: The three unknowns a rigid body problem usually carries
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Explain Back: Why the total moment about any point must be nought
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Practice: Finding an unknown force from a closed polygon
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Practice: Resolving three forces in two perpendicular directions
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WAEC Prep: A lamp hanging from two wires, solved 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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Practice: Using a binomial expansion to approximate a number
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Quiz: The situations a Poisson distribution models
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Explain Back: Testing whether data are Poisson by comparing mean and variance
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Quiz: The area under the normal curve, and what it represents
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Spot My Mistake: When the normal distribution may approximate the binomial
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Worked Example: The continuity correction when approximating a discrete distribution
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WAEC Prep: The zero vector, and what it means
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WAEC Prep: A three-dimensional vector parallel to another
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Worked Example: The distance between two points in three dimensions
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WAEC Prep: The distance between two points from their position vectors
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WAEC Prep: Adding two vectors given in component form
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