If the average of three numbers is V. If one of the numbers is Z and

Question

If the average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number?

A. ZY - V 
B. Z/V – 3 - Y 
C. Z/3 – V - Y 
D. 3V - Z - Y 
E. V - Z – Y

niks18 · Answer

Sum of three numbers will be = 3V
Hence the third no will be = 3V-(Z+Y)=3V-Z-Y

Option  D

ScottTargetTestPrep · Answer

We can let the remaining number = X; thus:

(X + Z + Y)/3 = V

X + Z + Y = 3V

X = 3V - Z - Y

Answer: D

souvonik2k · Answer

Let the 3rd number be x.
Average = (x+Y+Z)/3 = V
x+Y+Z = 3V
Hence x = 3V-Y-Z
Answer D.

pushpitkc · Answer

We can define average of some numbers
to be the sum of the numbers divided by a number.

Let the third number be X.

V = \frac{Z+Y+X}{3} 
X = 3V - Z - Y(Option D)

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