# word problem Math

posted by .

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?

• word problem Math -

The editor was right. The numbers add up to more than 500.

• word problem Math -

Using 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.

## Similar Questions

1. ### college math

The number of seniors at Freedom High School was 421 in 2002. If the number of seniors increases at a rate 1.7% per year, how many seniors will be in the class of 2014?
2. ### Applied statistics for business and economics

Only 0.02% of credit card holders of a company report the loss or theft of their credit cards each month. The company has 15,000 credit cards in the city of Memphis. Use the Poisson probability tables to answer the following questions. …

4. ### Geometry

A car dealership interviewed every driver who came onto their lot on Tuesday. This produced the following results: there were 34 people who owned trucks and 59 people who owned cars. If 19 people owned both a truck and a car and 7 …
5. ### Math-Can u help me Reiny? So confused :(

A car dealership interviewed every driver who came onto their lot on Tuesday. This produced the following results: there were 34 people who owned trucks and 59 people who owned cars. If 19 people owned both a truck and a car and 7 …
6. ### statistics

I need to see the steps to figuring out this problem. 270 patients were given a placebo of those 270, 19 had headaches. What percentage of this placebo group reported headaches?
7. ### geometery

please walk me through this I am having a hard time with this A survey of 500 showed the following 15 had only camping 20 had only hiking trails 35 had only picnicking 185 had camping 140 had camping and hiking trails 125 had camping …
8. ### Language Arts

1. Which of the following sentence uses the past tense verb?
9. ### Language arts

1. Which of the following sentences uses the past perfect verb tense. A) By June, I will have owned the camera shop for a decade. B) After it was sold, I had owned the camera shop for 12 year as C) I cannot recall a time when I have …
10. ### Language Arts

1. Which of the following sentences uses the past perfect verb tense. A) By June, I will have owned the camera shop for a decade. B) After it was sold, I had owned the camera shop for 12 year as C) I cannot recall a time when I have …

More Similar Questions