CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A family of 5 members had an average age of 33 years. Immediately afterward a baby was born. What will be the average age of the family after 4 years?
A. 32.5 years
B. 31.5 years
C. 30.5 years
D. 33.5 years
Correct Answer: B
Original members gain 20 years and the child is 4; divide total by 6. Mean = 31.5 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A family of 4 members had an average age of 32 years. Immediately afterward a baby was born. What will be the average age of the family after 3 years?
A. 30.6 years
B. 28.6 years
C. 27.6 years
D. 29.6 years
Correct Answer: B
Original members gain 12 years and the child is 3; divide total by 5. Mean = 28.6 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A family of 7 members had an average age of 31 years. Immediately afterward a baby was born. What will be the average age of the family after 6 years?
A. 33.12 years
B. 32.12 years
C. 35.12 years
D. 34.12 years
Correct Answer: A
Original members gain 42 years and the child is 6; divide total by 8. Mean = 33.12 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A family of 6 members had an average age of 30 years. Immediately afterward a baby was born. What will be the average age of the family after 5 years?
A. 31.71 years
B. 30.71 years
C. 29.71 years
D. 32.71 years
Correct Answer: B
Original members gain 30 years and the child is 5; divide total by 7. Mean = 30.71 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A family of 5 members had an average age of 29 years. Immediately afterward a baby was born. What will be the average age of the family after 4 years?
A. 30.17 years
B. 28.17 years
C. 29.17 years
D. 27.17 years
Correct Answer: B
Original members gain 20 years and the child is 4; divide total by 6. Mean = 28.17 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A family of 4 members had an average age of 28 years. Immediately afterward a baby was born. What will be the average age of the family after 3 years?
A. 27.4 years
B. 26.4 years
C. 25.4 years
D. 24.4 years
Correct Answer: C
Original members gain 12 years and the child is 3; divide total by 5. Mean = 25.4 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A family of 7 members had an average age of 27 years. Immediately afterward a baby was born. What will be the average age of the family after 6 years?
A. 28.62 years
B. 30.62 years
C. 29.62 years
D. 31.62 years
Correct Answer: C
Original members gain 42 years and the child is 6; divide total by 8. Mean = 29.62 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A family of 6 members had an average age of 26 years. Immediately afterward a baby was born. What will be the average age of the family after 5 years?
A. 28.29 years
B. 26.29 years
C. 27.29 years
D. 29.29 years
Correct Answer: C
Original members gain 30 years and the child is 5; divide total by 7. Mean = 27.29 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A family of 5 members had an average age of 25 years. Immediately afterward a baby was born. What will be the average age of the family after 4 years?
A. 25.83 years
B. 23.83 years
C. 24.83 years
D. 26.83 years
Correct Answer: C
Original members gain 20 years and the child is 4; divide total by 6. Mean = 24.83 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A family of 4 members had an average age of 24 years. Immediately afterward a baby was born. What will be the average age of the family after 3 years?
A. 23.2 years
B. 22.2 years
C. 24.2 years
D. 21.2 years
Correct Answer: B
Original members gain 12 years and the child is 3; divide total by 5. Mean = 22.2 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 14 people has average age 41. A person aged 34 is replaced by one aged 45. What is the new average age?
A. 42.79 years
B. 40.79 years
C. 43.79 years
D. 41.79 years
Correct Answer: D
Mean changes by (45−34)/14; new mean = 41.79 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 13 people has average age 40. A person aged 33 is replaced by one aged 43. What is the new average age?
A. 42.77 years
B. 40.77 years
C. 39.77 years
D. 41.77 years
Correct Answer: B
Mean changes by (43−33)/13; new mean = 40.77 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 12 people has average age 39. A person aged 32 is replaced by one aged 45. What is the new average age?
A. 40.08 years
B. 41.08 years
C. 42.08 years
D. 39.08 years
Correct Answer: A
Mean changes by (45−32)/12; new mean = 40.08 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 11 people has average age 38. A person aged 31 is replaced by one aged 43. What is the new average age?
A. 38.09 years
B. 40.09 years
C. 39.09 years
D. 41.09 years
Correct Answer: C
Mean changes by (43−31)/11; new mean = 39.09 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 10 people has average age 37. A person aged 30 is replaced by one aged 41. What is the new average age?
A. 39.1 years
B. 40.1 years
C. 37.1 years
D. 38.1 years
Correct Answer: D
Mean changes by (41−30)/10; new mean = 38.1 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 14 people has average age 36. A person aged 29 is replaced by one aged 39. What is the new average age?
A. 38.71 years
B. 37.71 years
C. 36.71 years
D. 35.71 years
Correct Answer: C
Mean changes by (39−29)/14; new mean = 36.71 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 13 people has average age 35. A person aged 28 is replaced by one aged 41. What is the new average age?
A. 37 years
B. 35 years
C. 38 years
D. 36 years
Correct Answer: D
Mean changes by (41−28)/13; new mean = 36 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 12 people has average age 34. A person aged 27 is replaced by one aged 39. What is the new average age?
A. 37 years
B. 36 years
C. 34 years
D. 35 years
Correct Answer: D
Mean changes by (39−27)/12; new mean = 35 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 11 people has average age 33. A person aged 26 is replaced by one aged 37. What is the new average age?
A. 36 years
B. 33 years
C. 34 years
D. 35 years
Correct Answer: C
Mean changes by (37−26)/11; new mean = 34 years.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 10 people has average age 32. A person aged 25 is replaced by one aged 35. What is the new average age?
A. 33 years
B. 35 years
C. 34 years
D. 32 years
Correct Answer: A
Mean changes by (35−25)/10; new mean = 33 years.