1,045 prompts matching "Solving two simultaneous equations by multiplying by the inverse"
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Worked Example: Arranging r of n objects in a line
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Quiz: Arrangements of a word with no repeated letters
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Practice: Arrangements of a word with repeated letters
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Common Mistakes: Arranging objects when some must stay in a fixed order
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Learn: What makes a permutation cyclic
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Quiz: Why one person is fixed in a circular arrangement
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Spot My Mistake: Arrangements round a table with men and women alternating
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Common Mistakes: Comparing a line arrangement with a circular one
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Final Revision: A word problem about seating at a round table
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Learn: Selecting a team of five from a squad
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Practice: A selection that must include one particular member
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Explain Back: A selection that must exclude one particular member
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Spot My Mistake: A selection with at least a stated number of one kind
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WAEC Prep: A selection with at most a stated number of one kind
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Final Revision: A word problem about choosing a delegation
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Learn: Probability as favourable outcomes over total outcomes
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Explain Back: Probability with replacement and without replacement
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Final Revision: A word problem about a lottery draw
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Spot My Mistake: Expanding a bracket with a minus sign inside it
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WAEC Prep: Expanding a bracket with a coefficient on x
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