Printers and Computers

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Printers and Computers

by msch14 » Thu Jun 18, 2009 4:06 pm
M orders 50 computers and printers. N orders 60 computers and printers. How many computers did M order?

A. M & N ordered the same number of computers
B. N ordered 10 more printers then M

The OA is E . How would you go about setting up this problem?
Source: — Data Sufficiency |

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IMO

by kc_raj » Thu Jun 18, 2009 4:11 pm
Mc+Mp=50
Nc+Np=60,

A Mc=Nc, still 3 variables, 2 equns

B Np=Mp+10, 4 var, 3 eqns

combining we get back B, not any new eqn, so E