CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 18 numbers is 48. When one number is removed, the average of the remaining 17 numbers becomes 46. Find the removed number.
A. 90
B. 86
C. 82
D. 78
Correct Answer: C
Removed = 18×48−(17×46) = 82.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 17 numbers is 46. When one number is removed, the average of the remaining 16 numbers becomes 45. Find the removed number.
A. 62
B. 66
C. 58
D. 70
Correct Answer: A
Removed = 17×46−(16×45) = 62.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 16 numbers is 44. When one number is removed, the average of the remaining 15 numbers becomes 42. Find the removed number.
A. 82
B. 74
C. 70
D. 78
Correct Answer: B
Removed = 16×44−(15×42) = 74.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 15 numbers is 42. When one number is removed, the average of the remaining 14 numbers becomes 41. Find the removed number.
A. 52
B. 56
C. 60
D. 64
Correct Answer: B
Removed = 15×42−(14×41) = 56.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 14 numbers is 40. When one number is removed, the average of the remaining 13 numbers becomes 38. Find the removed number.
A. 66
B. 74
C. 70
D. 62
Correct Answer: A
Removed = 14×40−(13×38) = 66.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 13 numbers is 38. When one number is removed, the average of the remaining 12 numbers becomes 37. Find the removed number.
A. 54
B. 46
C. 58
D. 50
Correct Answer: D
Removed = 13×38−(12×37) = 50.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 12 numbers is 36. When one number is removed, the average of the remaining 11 numbers becomes 34. Find the removed number.
A. 66
B. 54
C. 62
D. 58
Correct Answer: D
Removed = 12×36−(11×34) = 58.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 11 numbers is 34. When one number is removed, the average of the remaining 10 numbers becomes 33. Find the removed number.
A. 48
B. 40
C. 52
D. 44
Correct Answer: D
Removed = 11×34−(10×33) = 44.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 10 numbers is 32. When one number is removed, the average of the remaining 9 numbers becomes 30. Find the removed number.
A. 46
B. 54
C. 58
D. 50
Correct Answer: D
Removed = 10×32−(9×30) = 50.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 9 numbers is 30. When one number is removed, the average of the remaining 8 numbers becomes 29. Find the removed number.
A. 42
B. 46
C. 38
D. 34
Correct Answer: C
Removed = 9×30−(8×29) = 38.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 17 numbers is 38. After adding one more number, the average becomes 39. What is the added number?
A. 60
B. 64
C. 52
D. 56
Correct Answer: D
Added = (18×39)−(17×38) = 56.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 16 numbers is 36. After adding one more number, the average becomes 39. What is the added number?
A. 83
B. 91
C. 87
D. 95
Correct Answer: C
Added = (17×39)−(16×36) = 87.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 15 numbers is 34. After adding one more number, the average becomes 36. What is the added number?
A. 62
B. 70
C. 66
D. 74
Correct Answer: C
Added = (16×36)−(15×34) = 66.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 14 numbers is 32. After adding one more number, the average becomes 33. What is the added number?
A. 55
B. 51
C. 47
D. 43
Correct Answer: C
Added = (15×33)−(14×32) = 47.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 13 numbers is 30. After adding one more number, the average becomes 33. What is the added number?
A. 72
B. 76
C. 68
D. 80
Correct Answer: A
Added = (14×33)−(13×30) = 72.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 12 numbers is 28. After adding one more number, the average becomes 30. What is the added number?
A. 62
B. 58
C. 50
D. 54
Correct Answer: D
Added = (13×30)−(12×28) = 54.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 11 numbers is 26. After adding one more number, the average becomes 27. What is the added number?
A. 46
B. 34
C. 38
D. 42
Correct Answer: C
Added = (12×27)−(11×26) = 38.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 10 numbers is 24. After adding one more number, the average becomes 27. What is the added number?
A. 65
B. 57
C. 53
D. 61
Correct Answer: B
Added = (11×27)−(10×24) = 57.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 9 numbers is 22. After adding one more number, the average becomes 24. What is the added number?
A. 42
B. 46
C. 50
D. 38
Correct Answer: A
Added = (10×24)−(9×22) = 42.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 8 numbers is 20. After adding one more number, the average becomes 21. What is the added number?
A. 33
B. 37
C. 25
D. 29
Correct Answer: D
Added = (9×21)−(8×20) = 29.