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Consider this data-sufficiency question: What is the average age of P, Q, and R? Statement I: The sum of P and Q’s ages is 50 years. Statement II: R is 30 years old. Which of these is correct?

1. Consider this data-sufficiency question: What is the average age of P, Q, and R? Statement I: The sum of P and Q’s ages is 50 years. Statement II: R is 30 years old. Which of these is correct?

 

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