CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The mean of 29 observations was reported as 59. One observation was recorded as 83 instead of 75. Find the corrected mean.
A. 58.72
B. 59.72
C. 59.22
D. 58.22
Correct Answer: A
Corrected mean = 59+(75−83)/29 = 58.72.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The mean of 28 observations was reported as 58. One observation was recorded as 81 instead of 74. Find the corrected mean.
A. 57.75
B. 58.25
C. 57.25
D. 58.75
Correct Answer: A
Corrected mean = 58+(74−81)/28 = 57.75.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The mean of 27 observations was reported as 57. One observation was recorded as 79 instead of 69. Find the corrected mean.
A. 57.63
B. 56.13
C. 56.63
D. 57.13
Correct Answer: C
Corrected mean = 57+(69−79)/27 = 56.63.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The mean of 26 observations was reported as 56. One observation was recorded as 77 instead of 68. Find the corrected mean.
A. 55.15
B. 55.65
C. 56.15
D. 56.65
Correct Answer: B
Corrected mean = 56+(68−77)/26 = 55.65.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The mean of 25 observations was reported as 55. One observation was recorded as 75 instead of 67. Find the corrected mean.
A. 55.18
B. 54.68
C. 54.18
D. 55.68
Correct Answer: B
Corrected mean = 55+(67−75)/25 = 54.68.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The mean of 24 observations was reported as 54. One observation was recorded as 73 instead of 66. Find the corrected mean.
A. 54.21
B. 53.71
C. 54.71
D. 53.21
Correct Answer: B
Corrected mean = 54+(66−73)/24 = 53.71.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The mean of 23 observations was reported as 53. One observation was recorded as 71 instead of 61. Find the corrected mean.
A. 52.57
B. 53.57
C. 52.07
D. 53.07
Correct Answer: A
Corrected mean = 53+(61−71)/23 = 52.57.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The mean of 22 observations was reported as 52. One observation was recorded as 69 instead of 60. Find the corrected mean.
A. 52.09
B. 51.09
C. 52.59
D. 51.59
Correct Answer: D
Corrected mean = 52+(60−69)/22 = 51.59.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The mean of 21 observations was reported as 51. One observation was recorded as 67 instead of 59. Find the corrected mean.
A. 50.12
B. 51.62
C. 51.12
D. 50.62
Correct Answer: D
Corrected mean = 51+(59−67)/21 = 50.62.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The mean of 20 observations was reported as 50. One observation was recorded as 65 instead of 58. Find the corrected mean.
A. 50.65
B. 49.15
C. 50.15
D. 49.65
Correct Answer: D
Corrected mean = 50+(58−65)/20 = 49.65.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The combined average of two classes is 51.14. Class A has 24 students averaging 48. Class B has 11 students. What is Class B's average?
A. 58
B. 56
C. 60
D. 62
Correct Answer: A
Class B mean = (combined total − Class A total)/11 = 58.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
Class A has 23 students averaging 46 marks and Class B has 10 students averaging 57. What is the overall average?
A. 51.33
B. 53.33
C. 49.33
D. 47.33
Correct Answer: C
Overall mean = (23×46+10×57)/33 = 49.33.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The combined average of two classes is 48.46. Class A has 22 students averaging 44. Class B has 13 students. What is Class B's average?
A. 60
B. 54
C. 56
D. 58
Correct Answer: C
Class B mean = (combined total − Class A total)/13 = 56.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
Class A has 21 students averaging 42 marks and Class B has 12 students averaging 55. What is the overall average?
A. 44.73
B. 48.73
C. 46.73
D. 50.73
Correct Answer: C
Overall mean = (21×42+12×55)/33 = 46.73.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The combined average of two classes is 47.1. Class A has 20 students averaging 40. Class B has 11 students. What is Class B's average?
A. 58
B. 60
C. 64
D. 62
Correct Answer: B
Class B mean = (combined total − Class A total)/11 = 60.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
Class A has 19 students averaging 48 marks and Class B has 10 students averaging 59. What is the overall average?
A. 53.79
B. 55.79
C. 49.79
D. 51.79
Correct Answer: D
Overall mean = (19×48+10×59)/29 = 51.79.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The combined average of two classes is 51.03. Class A has 18 students averaging 46. Class B has 13 students. What is Class B's average?
A. 62
B. 60
C. 58
D. 56
Correct Answer: C
Class B mean = (combined total − Class A total)/13 = 58.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
Class A has 17 students averaging 44 marks and Class B has 12 students averaging 57. What is the overall average?
A. 53.38
B. 49.38
C. 51.38
D. 47.38
Correct Answer: B
Overall mean = (17×44+12×57)/29 = 49.38.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The combined average of two classes is 47.7. Class A has 16 students averaging 42. Class B has 11 students. What is Class B's average?
A. 54
B. 56
C. 58
D. 60
Correct Answer: B
Class B mean = (combined total − Class A total)/11 = 56.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
Class A has 15 students averaging 40 marks and Class B has 10 students averaging 55. What is the overall average?
A. 48
B. 44
C. 46
D. 50
Correct Answer: C
Overall mean = (15×40+10×55)/25 = 46.