A data set has a mean of 20 and consists of 5 numbers. If four of the numbers are 15; 18; 22; and 25; what is the fifth number?
Difficulty: Medium
About this MCQ
Medium GRE item. Correct choice: A. 20.
- A. 20 ✓
- B. 18
Why not B: “18” is not 20.
- C. 22
Why not C: “22” is not 20.
- D. 25
Why not D: “25” is not 20.
Correct answer
A. 20
Explanation
20 (option A) is the accepted answer to “A data set has a mean of 20 and consists of 5 numbers. If four of the numbers are 15; 18; 22; and 25; what is the fifth number”. Option B (18) is a different value from 20. Option C (22) is a different value from 20. Option D (25) is a different value from 20. Keep 20 as the GRE fact for this stem.
Source: Original practice question; MCQsHub
Tags: American Exams, GRE, Quant, Statistics
Submitted by: MCQsHub Editorial
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