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If 25a + 25b = 115 what is the average of…

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

  1. A. 2.5
  2. B. 3.4
  3. C. 4.5
  4. D. 4.6

E. None of these

Here is complete explanation of If 25a + 25b = 115 what is the average of….

Solution(By ExamCraze Team)

25a + 25b = 115
⇒ 25 (a + b) = 115
⇒ a + b = $$frac{115}{25}$$
⇒ a + b = $$frac{23}{5}$$
∴ Average of a and b
= $$frac{a + b}{2}$$
= $$frac{23}{5}$$ × $$frac{1}{2}$$
= $$frac{23}{10}$$
= 2.3

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