if 25a 25b 115 then what is the average of a and b | Examsbook

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Q: If 25a + 25b = 115, then what is the average of a and b?

1
4.6
2
3.4
3
2.5
4
None of these

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Answer : 4. "None of these"
Explanation :
Answer: D) None of these Explanation:

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