1 . The average of 6 numbers is 8.5, when one number is discarded the average of the remaining numbers becomes 7.2. What is the discarded number?
- A. 7.8
- B. 9.8
- C. 15.0
- D. 12.4
- D. none of them
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1 . The average of 6 numbers is 8.5, when one number is discarded the average of the remaining numbers becomes 7.2. What is the discarded number?
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