# Need math help: how many different kinds of passes?

Anonymous
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### Question Description

Three 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?
 A. 9 possible passes B. 18 possible passes C. 15 possible passes D. 6 possible passes E. 12 possible passes F. 11 possible passes

Alex Maslovskii
School: University of Maryland

So every group of passengers may have 3 different types of passes

In that case 3 types for group 1 + 3 3 types for group 2 + 3 types for group 3 = 9 types of passes

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Anonymous
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