hard · GMAT Quant
A logistics company monitors 120 shipping containers for three types of tracking sensors: GPS, Humidity, and Pressure. Every container has at least one sensor. Records show that 75 containers have GPS sensors, 70 have Humidity sensors, and 55 have Pressure sensors. If the number of containers with sensors for exactly two of these categories is 40
What is the number of containers that have all three types of sensors?
- 20
- 40
- 10
- 80
- 55
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