Average

MCQ - 528-13295

Question:

Suppose the average of two numbers is WX. If the first number is X, what is the other number?

WX – X
2WX – W
W
2WX – W
2WX - X

Correct Answer: E

Explanation:

Suppose the average of two numbers is WX. If the first number is X, what is the other number?

Sum of values = Number of values × Average

= 2 × WX = 2WX

The other number = Sum of the two numbers - First number

The other number = 2WX - X

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