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August 3, 2015

Homework Help: word problem Math

Posted by Kendra on Monday, August 10, 2009 at 5:45pm.

A pollster interviewed 500 university seniors who owned credit cards. She reported that 240 had Goldcard, 290 had Supercard, and 270 had Thriftcard.
Of those seniors, the report said that:
80 owned only a Goldcard and a Supercard,
70 owned only a Goldcard and a Thriftcard,
60 owned only a Supercard and a Thriftcard, and
50 owned all three cards.

When the report was submitted for publication in the local campus newspaper, the editor refused to publish it, claiming the poll was not accurate. Was the editor right? Why or why not?

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