hard · GMAT Quant
Sable Forge selects a machine at random from two equally likely types. Type A yields a defect with probability dfrac14 and type B with probability dfrac34. The first sampled unit is defective. A second independent unit is then taken from the same machine.
What is the probability that the second unit is defective?
- dfrac34
- dfrac58
- dfrac14
- dfrac12
- dfrac116
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?