The average of x1 x2 x3 and x4 is 16 Half…

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The average of x1, x2, x3 and x4 is 16. Half the sum of x2, x3, x4 is 23. What is the value of x1?

  1. A. 17
  2. B. 18
  3. C. 19
  4. D. 20

Answer: Option B

Here is complete explanation of The average of x1 x2 x3 and x4 is 16 Half….

Solution(By ExamCraze Team)

x1 + x2 + x3 + x4 = 16 × 4 = 64
⇒ $$frac{1}{2}$$ (x2 + x3 + x4) = 23
⇒ x2 + x3 + x4 = 46
∴ x1 = 64 - 46
        = 18

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