Question 46
Measures of Central TendencyA student calculated the mean of 5 numbers as 45.3. While rechecking his working, he discovered that his total was short by 20.5. What is the correct mean of the 5 numbers?
- A.24.8
- B.41.2
- C.49.4
- D.65.8
Show the answer and explanation
Answer: C (49.4)
Explanation
His total was 5 × 45.3 = 226.5. The correct total is 226.5 + 20.5 = 247, so the correct mean is 247 ÷ 5 = 49.4.