CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 17 people is 39 years. One person aged 38 years leaves. What is the new average age?
A. 39.06 years
B. 41.06 years
C. 38.06 years
D. 40.06 years
Correct Answer: A
New mean = (17×39−38)/16 = 39.06 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 16 people is 38 years. One person aged 36 years leaves. What is the new average age?
A. 40.13 years
B. 37.13 years
C. 39.13 years
D. 38.13 years
Correct Answer: D
New mean = (16×38−36)/15 = 38.13 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 15 people is 37 years. One person aged 34 years leaves. What is the new average age?
A. 39.21 years
B. 37.21 years
C. 36.21 years
D. 38.21 years
Correct Answer: B
New mean = (15×37−34)/14 = 37.21 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 14 people is 36 years. One person aged 32 years leaves. What is the new average age?
A. 35.31 years
B. 38.31 years
C. 36.31 years
D. 37.31 years
Correct Answer: C
New mean = (14×36−32)/13 = 36.31 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 13 people is 35 years. One person aged 30 years leaves. What is the new average age?
A. 36.42 years
B. 34.42 years
C. 37.42 years
D. 35.42 years
Correct Answer: D
New mean = (13×35−30)/12 = 35.42 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 12 people is 34 years. One person aged 28 years leaves. What is the new average age?
A. 35.55 years
B. 34.55 years
C. 36.55 years
D. 33.55 years
Correct Answer: B
New mean = (12×34−28)/11 = 34.55 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 11 people is 33 years. One person aged 26 years leaves. What is the new average age?
A. 34.7 years
B. 32.7 years
C. 33.7 years
D. 35.7 years
Correct Answer: C
New mean = (11×33−26)/10 = 33.7 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 10 people is 32 years. One person aged 24 years leaves. What is the new average age?
A. 32.89 years
B. 33.89 years
C. 31.89 years
D. 34.89 years
Correct Answer: A
New mean = (10×32−24)/9 = 32.89 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 9 people is 31 years. One person aged 22 years leaves. What is the new average age?
A. 34.12 years
B. 31.12 years
C. 33.12 years
D. 32.12 years
Correct Answer: D
New mean = (9×31−22)/8 = 32.12 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 8 people is 30 years. One person aged 20 years leaves. What is the new average age?
A. 32.43 years
B. 30.43 years
C. 31.43 years
D. 33.43 years
Correct Answer: C
New mean = (8×30−20)/7 = 31.43 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 15 people is 29 years. A new member aged 28 years joins. What is the new average age?
A. 30.94 years
B. 27.94 years
C. 29.94 years
D. 28.94 years
Correct Answer: D
New mean = (15×29+28)/16 = 28.94 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 14 people is 28 years. A new member aged 26 years joins. What is the new average age?
A. 27.87 years
B. 26.87 years
C. 29.87 years
D. 28.87 years
Correct Answer: A
New mean = (14×28+26)/15 = 27.87 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 13 people is 27 years. A new member aged 24 years joins. What is the new average age?
A. 27.79 years
B. 28.79 years
C. 25.79 years
D. 26.79 years
Correct Answer: D
New mean = (13×27+24)/14 = 26.79 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 12 people is 26 years. A new member aged 22 years joins. What is the new average age?
A. 27.69 years
B. 26.69 years
C. 24.69 years
D. 25.69 years
Correct Answer: D
New mean = (12×26+22)/13 = 25.69 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 11 people is 25 years. A new member aged 20 years joins. What is the new average age?
A. 23.58 years
B. 24.58 years
C. 26.58 years
D. 25.58 years
Correct Answer: B
New mean = (11×25+20)/12 = 24.58 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 10 people is 24 years. A new member aged 18 years joins. What is the new average age?
A. 24.45 years
B. 25.45 years
C. 22.45 years
D. 23.45 years
Correct Answer: D
New mean = (10×24+18)/11 = 23.45 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 9 people is 23 years. A new member aged 16 years joins. What is the new average age?
A. 24.3 years
B. 23.3 years
C. 21.3 years
D. 22.3 years
Correct Answer: D
New mean = (9×23+16)/10 = 22.3 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 8 people is 22 years. A new member aged 14 years joins. What is the new average age?
A. 22.11 years
B. 23.11 years
C. 21.11 years
D. 20.11 years
Correct Answer: C
New mean = (8×22+14)/9 = 21.11 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 7 people is 21 years. A new member aged 12 years joins. What is the new average age?
A. 20.88 years
B. 21.88 years
C. 19.88 years
D. 18.88 years
Correct Answer: C
New mean = (7×21+12)/8 = 19.88 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average age of 6 people is 20 years. A new member aged 10 years joins. What is the new average age?
A. 19.57 years
B. 17.57 years
C. 18.57 years
D. 20.57 years
Correct Answer: C
New mean = (6×20+10)/7 = 18.57 years.