Sunday

April 20, 2014

April 20, 2014

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

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?

- word problem Math -
**Ms. Sue**, Monday, August 10, 2009 at 6:38pmThe editor was right. The numbers add up to more than 500.

- word problem Math -
**Reiny**, Monday, August 10, 2009 at 8:02pmUsing the formula ...

n(A or B or C)

= n(A) + n(B) + n(C) - n(A and B) - n(A and C) - n(B and C) + n(A and B and C)

500 = 240 + 290 + 270 - 80 - 70 - 60 + 50

500 = 640

not true, so data not consistent.

You could also make Venn diagrams to show the data distribution.

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