The average of 2 7 6 and x is 5 and…

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The average of 2, 7, 6 and x is 5 and the average of 18, 1, 6, x and y is 10. What is the value of y?

  1. A. 5
  2. B. 10
  3. C. 20
  4. D. 30

Answer: Option C

Here is complete explanation of The average of 2 7 6 and x is 5 and….

Solution(By ExamCraze Team)

We have:
$$eqalign{ & Rightarrow left( {frac{{2 + 7 + 6 + x}}{5}} right) = 5 cr & Rightarrow 15 + x = 20 cr & Rightarrow x = 5 cr} $$
Also,
$$eqalign{ & Rightarrow left( {frac{{18 + 1 + 6 + x + y}}{5}} right) = 10 cr & Rightarrow 25 + 5 + y = 50 cr & Rightarrow y = 20 cr} $$

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