hard · GMAT Quant
A production facility uses two assembly lines, Line X and Line Y, to produce a total of 100 units per day. Line X produces 60 units, of which 10% are defective, and Line Y produces 40 units, of which 20% are defective.
If two units are selected at random from the day's total production with replacement, and it is given that at least one of the units is defective, what is the probability that both units were produced by Line Y?
- dfrac48217
- dfrac425
- dfrac821
- dfrac16651
- dfrac17
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