medium · GMAT Quant
In a lab of 150 people, 70 use Device A, 60 use Device B, and 50 use Device C. Exactly 20 use both A and B, exactly 15 use both B and C, and exactly 10 use both A and C. No one uses all three devices.
How many people use at least one of the three devices?
- 115
- 125
- 135
- 145
- 150
Sign up free to see the explanation and track your rank →
More GMAT Quant practice
- Including both endpoints, how many distinct integer price points are in this range?
- Which of the following expressions must result in a positive value?
- Which property of arithmetic justifies that first step?
- Which of the following must also be an even integer?
- Which of the following inequalities correctly represents this range?
- Which of the following includes the number 0?
- How many unique meal combinations can a customer create?
- What is the probability that the lightbulb is functional?