medium · GMAT Quant
A researcher studies 50 clinical trial participants. 30 participants received Treatment X and 20 participants received Treatment Y. Of those who received Treatment X, 12 showed significant improvement. Of those who received Treatment Y, 8 showed significant improvement.
If a participant is chosen at random and showed significant improvement, what is the probability they received Treatment Y?
- dfrac25
- dfrac425
- dfrac35
- dfrac12
- dfrac23
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