medium · GMAT Quant

A software firm tests 25 code modules for vulnerabilities. Exactly 10 modules are written in Language A and 15 are written in Language B. Vulnerability scans detect flaws in 8 modules of Language A and 2 modules of Language B.

If a module is selected at random from those found to have flaws, what is the probability it was written in Language B?

  1. dfrac15
  2. dfrac215
  3. dfrac225
  4. dfrac45
  5. dfrac1025

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