A truck driver can take three routes from city A to city B, four from city B
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A truck driver can take three routes from city A to city B, four from city B to city C, and three from city C to city D. When traveling from A to D, if the driver must drive from A to B to C to D, how many possible A-to-D routes are available?
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Related Book For 
Introduction To Probability And Statistics
ISBN: 9780357114469
15th Edition
Authors: William Mendenhall Iii , Robert Beaver , Barbara Beaver
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