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 Solution
- There were 15 people in the survey who owned neither a VCR nor
a computer. The picture below shows how to classify the 200 people
in the survey.
| 80% of 200 = 160 |
160 people owned a VCR. |
| 50% of 200 = 100 |
100 people owned a computer. |
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75 people owned both a VCR and a computer. |
Notice that 185 people are inside the strings (85 + 75 + 25 =
185), so 15 people are outside; that is, 15 people owned neither
a VCR nor a computer.
- 160 people in the survey owned a VCR (see problem #1).
Half (80) watched movies
Half (80) taped TV shows |
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Some (32) watched movies
and taped TV shows. |
| 20% of 160 = 32 |
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Some (32) never used their VCR |
The picture below shows how to classify the 160 people who owned
a VCR.
Back to Math Mountain
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