Four different types of monthly commuter passes are offered by a city's local transit authority for three different groups of passengers. How many different kinds of passes must be possible?

__________ possible passes

Question

Four different types of monthly commuter passes are offered by a city's local transit authority for three different groups of passengers. How many different kinds of passes must be possible?
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__________ possible passes

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The Answer of Four different types of monthly commuter passes are offered by a city's local transit authority for three different groups of passengers. How many different kinds of passes must be possible?
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__________ possible passes

Four Different Types of Monthly Commuter Passes Are Offered by a City's