Civil Service Exam Reviewer · Averages · hard
The average of five numbers is 47. Four of them are 29, 58, 39, 48. What is the fifth number?
- 47
- 66
- 44
- 61
Answer
D. 61
Solution
Total = 5 × 47 = 235. Fifth = 235 − 174 = 61.
More Averages questions
- After 7 exams, Ivan's average is 73. What score on the next exam would raise the average to exactly 74?
- The average of a, b and c is 31, and the average of a and b is 34. What is c?
- In a 10-item quiz, the scores and number of students were: 5 (6), 6 (3), 7 (9), 8 (3), 9 (6), 10 (1). What is the mean score?
- The average monthly salary of 20 employees is ₱24,000. When the manager's salary is included, the average rises by ₱1,500. What is the…
- In a contest, the highest and lowest of the judges' scores are dropped and the rest are averaged. The scores are 75, 97, 95, 66, 92, 60…
- A bus travels 20 km at 70 km/h, then 60 km at 40 km/h, then 20 km at 50 km/h. What is its average speed for the whole trip?
- The average of 7 numbers is 31. The average of the first 4 is 36, and the average of the last 4 is 30. What is the middle (4th) number?
- The average age of 17 committee members increases by 2.5 years when a member aged 41 is replaced by a new member. How old is the new member?
- The average of 23 test scores was computed as 60. Later it was found that a score of 93 had been recorded as 66. What is the correct…
- The average of 8 consecutive even numbers is 11. What is the smallest of them?