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A recent transportation survey of w urban commuters that is n u w yielded the following information x commuters rode

 
 

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1.A recent transportation survey of w urban commuters (that is, n(U) = w) yielded the following information: x commuters rode ...

formation: x commuters rode neither trains nor buses, y rode trains, and z rode only trains. How many people rode the following? (a) trains and buses (b) only buses (c) buses (d) trains or buses I answered a easily but can't figure out b-d
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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

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