CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 16 numbers is 49. If one number is decreased by 8, what is the new average?
A. 50.5
B. 47.5
C. 49.5
D. 48.5
Correct Answer: D
Average decreases by 8/16; new mean = 48.5.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 15 numbers is 48. If one number is increased by 6, what is the new average?
A. 48.4
B. 49.4
C. 47.4
D. 50.4
Correct Answer: A
Average increases by 6/15; new mean = 48.4.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 14 numbers is 47. If one number is decreased by 12, what is the new average?
A. 48.14
B. 47.14
C. 46.14
D. 45.14
Correct Answer: C
Average decreases by 12/14; new mean = 46.14.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 13 numbers is 46. If one number is increased by 10, what is the new average?
A. 45.77
B. 46.77
C. 47.77
D. 48.77
Correct Answer: B
Average increases by 10/13; new mean = 46.77.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 12 numbers is 45. If one number is decreased by 8, what is the new average?
A. 45.33
B. 46.33
C. 43.33
D. 44.33
Correct Answer: D
Average decreases by 8/12; new mean = 44.33.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 16 numbers is 44. If one number is increased by 6, what is the new average?
A. 46.38
B. 43.38
C. 44.38
D. 45.38
Correct Answer: C
Average increases by 6/16; new mean = 44.38.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 15 numbers is 43. If one number is decreased by 12, what is the new average?
A. 41.2
B. 44.2
C. 42.2
D. 43.2
Correct Answer: C
Average decreases by 12/15; new mean = 42.2.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 14 numbers is 42. If one number is increased by 10, what is the new average?
A. 44.71
B. 41.71
C. 42.71
D. 43.71
Correct Answer: C
Average increases by 10/14; new mean = 42.71.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 13 numbers is 41. If one number is decreased by 8, what is the new average?
A. 41.38
B. 39.38
C. 42.38
D. 40.38
Correct Answer: D
Average decreases by 8/13; new mean = 40.38.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 12 numbers is 40. If one number is increased by 6, what is the new average?
A. 40.5
B. 42.5
C. 39.5
D. 41.5
Correct Answer: A
Average increases by 6/12; new mean = 40.5.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a group of 13 observations with average 44, a value 38 is replaced by 50. What is the new average?
A. 44.92
B. 43.92
C. 45.92
D. 46.92
Correct Answer: A
New average = 44+(50−38)/13 = 44.92.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a group of 12 observations with average 43, a value 36 is replaced by 47. What is the new average?
A. 43.92
B. 44.92
C. 45.92
D. 42.92
Correct Answer: A
New average = 43+(47−36)/12 = 43.92.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a group of 11 observations with average 42, a value 34 is replaced by 44. What is the new average?
A. 43.91
B. 42.91
C. 41.91
D. 44.91
Correct Answer: B
New average = 42+(44−34)/11 = 42.91.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a group of 10 observations with average 41, a value 32 is replaced by 41. What is the new average?
A. 41.9
B. 43.9
C. 42.9
D. 40.9
Correct Answer: A
New average = 41+(41−32)/10 = 41.9.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a group of 15 observations with average 40, a value 30 is replaced by 38. What is the new average?
A. 40.53
B. 42.53
C. 39.53
D. 41.53
Correct Answer: A
New average = 40+(38−30)/15 = 40.53.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a group of 14 observations with average 39, a value 28 is replaced by 40. What is the new average?
A. 38.86
B. 40.86
C. 39.86
D. 41.86
Correct Answer: C
New average = 39+(40−28)/14 = 39.86.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a group of 13 observations with average 38, a value 26 is replaced by 37. What is the new average?
A. 40.85
B. 38.85
C. 39.85
D. 37.85
Correct Answer: B
New average = 38+(37−26)/13 = 38.85.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a group of 12 observations with average 37, a value 24 is replaced by 34. What is the new average?
A. 39.83
B. 37.83
C. 38.83
D. 36.83
Correct Answer: B
New average = 37+(34−24)/12 = 37.83.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a group of 11 observations with average 36, a value 22 is replaced by 31. What is the new average?
A. 37.82
B. 36.82
C. 35.82
D. 38.82
Correct Answer: B
New average = 36+(31−22)/11 = 36.82.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
In a group of 10 observations with average 35, a value 20 is replaced by 28. What is the new average?
A. 34.8
B. 36.8
C. 37.8
D. 35.8
Correct Answer: D
New average = 35+(28−20)/10 = 35.8.