2025 · Q94
The arithmetic mean of 200 observations is 60. If 5 is multiplied to each observation, what is the new mean?
Elementary MathematicsStatistics
- A12
- B300
- C65
- D120
Explanation
Multiplying every observation by 5 scales the mean by 5: 60*5 = 300. Adding a constant would shift the mean, but multiplying scales it. Option A (12) is the divide-by-5 distractor.