1,045 prompts matching "Checking an inverse by working the operation both ways"
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Quiz: Arrangements of a word with no repeated letters
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Spot My Mistake: Arrangements with two particular items adjacent
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WAEC Prep: Arrangements with two particular items not adjacent
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Common Mistakes: Arranging objects when some must stay in a fixed order
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Worked Example: The number of ways n people sit round a round table
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Quiz: Why one person is fixed in a circular arrangement
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Explain Back: Circular arrangements with two people kept apart
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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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Worked Example: Selections in which the order does not matter
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Quiz: Selecting from two groups at the same time
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Common Mistakes: The number of ways of dividing a class into groups
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Worked Example: Counting the total outcomes with combinations
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Quiz: The probability of drawing two red balls
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Explain Back: Probability with replacement and without replacement
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Spot My Mistake: The probability that a committee contains a given person
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WAEC Prep: The probability of at least one of a kind
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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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Quiz: Finding the term in x cubed
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