medium · GMAT Quant
A security system uses 4 independent sensors. The probability that any sensor correctly detects an intrusion is dfrac23.
What is the probability that exactly 3 of the 4 sensors correctly detect an intrusion?
- dfrac3281
- dfrac881
- dfrac827
- dfrac1681
- dfrac181
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?