Lawyer and survey agency

A survey agency recently reported their results of a recent survey in the local newspaper. The report clearly states that exactly 100 lawyers were interviewed. Of the one hundred, 75 own BMWs, 95 own Volvos, and 50 lawyers own both a BMW and a Volvo.

Within a short time, several lawyers argue that the results are incorrect. How can they tell?


  1. 50 own both, so 45 own only Volvo and 25 own only BMW...the sum is greater than 100..hence incorrect.


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