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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?
Answer & Solution
Correct Answer:
Option
B
x1 + x2 + x3 + x4 = 16 × 4 = 64
⇒ $$\frac{1}{2}$$ (x2 + x3 + x4) = 23
⇒ x2 + x3 + x4 = 46
∴ x1 = 64 - 46
= 18
⇒ $$\frac{1}{2}$$ (x2 + x3 + x4) = 23
⇒ x2 + x3 + x4 = 46
∴ x1 = 64 - 46
= 18
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