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I need help to solve 1. How many seven-digit telephone numbers are available if none of the first three digits can be '0'? [2] 2.

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I need help to solve

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1. How many seven-digit telephone numbers are available if none of the first three digits can be '0'? [2] 2. If Marcus is drawing cards from a deck, what is the probability that he selects a. three aces followed by two jacks? [2] b. Two hearts followed by three clubs? [2]

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