CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group has overall mean 44.29. One section has 12 members averaging 34; the other section averages 58. How many members are in the second section?
A. 10
B. 11
C. 9
D. 8
Correct Answer: C
Use the combined-mean equation and solve for the second count: 9.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group has overall mean 42.68. One section has 11 members averaging 33; the other section averages 56. How many members are in the second section?
A. 10
B. 9
C. 8
D. 7
Correct Answer: C
Use the combined-mean equation and solve for the second count: 8.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group has overall mean 41.06. One section has 10 members averaging 32; the other section averages 54. How many members are in the second section?
A. 6
B. 9
C. 7
D. 8
Correct Answer: C
Use the combined-mean equation and solve for the second count: 7.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group has overall mean 39.4. One section has 9 members averaging 31; the other section averages 52. How many members are in the second section?
A. 7
B. 8
C. 5
D. 6
Correct Answer: D
Use the combined-mean equation and solve for the second count: 6.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group has overall mean 37.69. One section has 8 members averaging 30; the other section averages 50. How many members are in the second section?
A. 7
B. 6
C. 5
D. 4
Correct Answer: C
Use the combined-mean equation and solve for the second count: 5.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 26 students have an average of 47 and another 10 students have an average of 59. What is the class average?
A. 50.33
B. 49.33
C. 51.33
D. 52.33
Correct Answer: A
Combined mean = (26×47+10×59)/36 = 50.33.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 25 students have an average of 46 and another 16 students have an average of 58. What is the class average?
A. 50.68
B. 52.68
C. 51.68
D. 49.68
Correct Answer: A
Combined mean = (25×46+16×58)/41 = 50.68.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 24 students have an average of 45 and another 15 students have an average of 57. What is the class average?
A. 50.62
B. 48.62
C. 49.62
D. 51.62
Correct Answer: C
Combined mean = (24×45+15×57)/39 = 49.62.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 23 students have an average of 50 and another 14 students have an average of 56. What is the class average?
A. 54.27
B. 52.27
C. 53.27
D. 51.27
Correct Answer: B
Combined mean = (23×50+14×56)/37 = 52.27.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 22 students have an average of 49 and another 13 students have an average of 55. What is the class average?
A. 51.23
B. 50.23
C. 53.23
D. 52.23
Correct Answer: A
Combined mean = (22×49+13×55)/35 = 51.23.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 21 students have an average of 48 and another 12 students have an average of 59. What is the class average?
A. 51
B. 52
C. 54
D. 53
Correct Answer: B
Combined mean = (21×48+12×59)/33 = 52.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 20 students have an average of 47 and another 11 students have an average of 58. What is the class average?
A. 50.9
B. 52.9
C. 51.9
D. 49.9
Correct Answer: A
Combined mean = (20×47+11×58)/31 = 50.9.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 19 students have an average of 46 and another 10 students have an average of 57. What is the class average?
A. 49.79
B. 50.79
C. 48.79
D. 51.79
Correct Answer: A
Combined mean = (19×46+10×57)/29 = 49.79.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 18 students have an average of 45 and another 16 students have an average of 56. What is the class average?
A. 52.18
B. 49.18
C. 50.18
D. 51.18
Correct Answer: C
Combined mean = (18×45+16×56)/34 = 50.18.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 17 students have an average of 50 and another 15 students have an average of 55. What is the class average?
A. 51.34
B. 53.34
C. 52.34
D. 54.34
Correct Answer: C
Combined mean = (17×50+15×55)/32 = 52.34.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 16 students have an average of 49 and another 14 students have an average of 59. What is the class average?
A. 54.67
B. 52.67
C. 55.67
D. 53.67
Correct Answer: D
Combined mean = (16×49+14×59)/30 = 53.67.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 15 students have an average of 48 and another 13 students have an average of 58. What is the class average?
A. 54.64
B. 51.64
C. 53.64
D. 52.64
Correct Answer: D
Combined mean = (15×48+13×58)/28 = 52.64.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 14 students have an average of 47 and another 12 students have an average of 57. What is the class average?
A. 52.62
B. 51.62
C. 53.62
D. 50.62
Correct Answer: B
Combined mean = (14×47+12×57)/26 = 51.62.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 13 students have an average of 46 and another 11 students have an average of 56. What is the class average?
A. 52.58
B. 51.58
C. 49.58
D. 50.58
Correct Answer: D
Combined mean = (13×46+11×56)/24 = 50.58.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a class, 12 students have an average of 45 and another 10 students have an average of 55. What is the class average?
A. 48.55
B. 49.55
C. 50.55
D. 51.55
Correct Answer: B
Combined mean = (12×45+10×55)/22 = 49.55.