hard · GMAT Quant
In a survey of 200 households, 120 have a TV, 90 have a computer, and 70 have a smartphone. In addition, 40 have both a TV and a computer, 30 have a TV and a smartphone, 25 have a computer and a smartphone, and 15 have all three devices.
How many households have NONE of these devices?
- 10
- 15
- 0
- 5
- 25
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