medium · GRE Quant
In a manufacturing quality review, the events “belongs to tier 1” and “belongs to tier 2” are mutually exclusive. Their probabilities are 34% and 47%, respectively. What is the probability that a selected participant belongs to tier 1 or belongs to tier 2?
- 15.98%
- 13%
- 66%
- 53%
- 81%
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