Civil Service Exam Reviewer · Averages · hard
The average of 19 test scores was computed as 69. Later it was found that a score of 68 had been recorded as 74. What is the correct average?
- 69.32
- 69
- 63
- 68.68
Answer
D. 68.68
Solution
Wrong sum = 1311. Correct sum = 1311 − 74 + 68 = 1305. Correct average = 68.68.
More Averages questions
- A student's grades (with units) are: 1.5 (3 units), 1.25 (5 units), 1.5 (3 units), 1 (3 units). What is the weighted average (GWA)?
- Oscar's scores in the first 5 exams are 82, 83, 86, 91, 77. What score is needed in the next exam to have an average of 85?
- What is the median of 55, 81, 32, 48, 28, 99?
- The average of a set of numbers is 48. If 5 is added to each number, what is the new average?
- What is the average of the first 27 positive even numbers?
- Section A has 39 students with an average of 70; Section B has 26 students with an average of 91. What is the combined average?
- The average of 4 numbers is 51. If 65 is added to the set, what is the new average?
- A student's grades (with units) are: 2 (3 units), 1.75 (2 units), 1.5 (3 units), 2.25 (3 units). What is the weighted average (GWA)?
- Ramon's scores in the first 3 exams are 90, 78, 89. What score is needed in the next exam to have an average of 87?
- What is the median of 64, 35, 17, 84, 12, 50?