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1
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The expression  is equal to
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2
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What is the value of  ?
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3
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Which expression is equivalent to  ?
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4
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If  represents the number of combinations of
n items taken r at a time, what is the value of  ?
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5
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What is the value of  ?
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6
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The value of  is
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7
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What is the value of  ?
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8
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What is the value of  ? a) | 1 | c) | 0 | b) |  | d) |  |
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9
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The summation  equals
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