CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A couple's average age is 37 years. A baby is born immediately. What will be the average age of the three family members after 5 years?
A. 30.67 years
B. 29.67 years
C. 31.67 years
D. 28.67 years
Correct Answer: B
After 5 years: couple total = 2×(37+5), child age = 5; divide by 3.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A couple's average age is 36 years. A baby is born immediately. What will be the average age of the three family members after 4 years?
A. 30 years
B. 28 years
C. 29 years
D. 27 years
Correct Answer: B
After 4 years: couple total = 2×(36+4), child age = 4; divide by 3.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A couple's average age is 35 years. A baby is born immediately. What will be the average age of the three family members after 7 years?
A. 31.33 years
B. 30.33 years
C. 29.33 years
D. 32.33 years
Correct Answer: B
After 7 years: couple total = 2×(35+7), child age = 7; divide by 3.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A couple's average age is 34 years. A baby is born immediately. What will be the average age of the three family members after 6 years?
A. 29.67 years
B. 27.67 years
C. 30.67 years
D. 28.67 years
Correct Answer: D
After 6 years: couple total = 2×(34+6), child age = 6; divide by 3.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A couple's average age is 33 years. A baby is born immediately. What will be the average age of the three family members after 5 years?
A. 26 years
B. 27 years
C. 28 years
D. 29 years
Correct Answer: B
After 5 years: couple total = 2×(33+5), child age = 5; divide by 3.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A couple's average age is 32 years. A baby is born immediately. What will be the average age of the three family members after 4 years?
A. 25.33 years
B. 26.33 years
C. 24.33 years
D. 27.33 years
Correct Answer: A
After 4 years: couple total = 2×(32+4), child age = 4; divide by 3.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A couple's average age is 31 years. A baby is born immediately. What will be the average age of the three family members after 7 years?
A. 26.67 years
B. 29.67 years
C. 27.67 years
D. 28.67 years
Correct Answer: C
After 7 years: couple total = 2×(31+7), child age = 7; divide by 3.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A couple's average age is 30 years. A baby is born immediately. What will be the average age of the three family members after 6 years?
A. 28 years
B. 25 years
C. 27 years
D. 26 years
Correct Answer: D
After 6 years: couple total = 2×(30+6), child age = 6; divide by 3.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A couple's average age is 29 years. A baby is born immediately. What will be the average age of the three family members after 5 years?
A. 24.33 years
B. 23.33 years
C. 26.33 years
D. 25.33 years
Correct Answer: A
After 5 years: couple total = 2×(29+5), child age = 5; divide by 3.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A couple's average age is 28 years. A baby is born immediately. What will be the average age of the three family members after 4 years?
A. 24.67 years
B. 22.67 years
C. 23.67 years
D. 21.67 years
Correct Answer: B
After 4 years: couple total = 2×(28+4), child age = 4; divide by 3.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 17 people has average age 39. One person leaves and another aged 31 joins; the new average becomes 38. What was the age of the person who left?
A. 52 years
B. 48 years
C. 46 years
D. 50 years
Correct Answer: B
Old total + 31 − leaving age = 17×38; leaving age = 48.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 16 people has average age 38. One person leaves and another aged 30 joins; the new average becomes 37. What was the age of the person who left?
A. 44 years
B. 46 years
C. 50 years
D. 48 years
Correct Answer: B
Old total + 30 − leaving age = 16×37; leaving age = 46.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 15 people has average age 37. One person leaves and another aged 29 joins; the new average becomes 36. What was the age of the person who left?
A. 42 years
B. 46 years
C. 44 years
D. 48 years
Correct Answer: C
Old total + 29 − leaving age = 15×36; leaving age = 44.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 14 people has average age 36. One person leaves and another aged 28 joins; the new average becomes 35. What was the age of the person who left?
A. 44 years
B. 46 years
C. 42 years
D. 40 years
Correct Answer: C
Old total + 28 − leaving age = 14×35; leaving age = 42.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 13 people has average age 35. One person leaves and another aged 27 joins; the new average becomes 34. What was the age of the person who left?
A. 38 years
B. 42 years
C. 44 years
D. 40 years
Correct Answer: D
Old total + 27 − leaving age = 13×34; leaving age = 40.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 12 people has average age 34. One person leaves and another aged 26 joins; the new average becomes 33. What was the age of the person who left?
A. 36 years
B. 40 years
C. 42 years
D. 38 years
Correct Answer: D
Old total + 26 − leaving age = 12×33; leaving age = 38.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 11 people has average age 33. One person leaves and another aged 25 joins; the new average becomes 32. What was the age of the person who left?
A. 40 years
B. 36 years
C. 38 years
D. 34 years
Correct Answer: B
Old total + 25 − leaving age = 11×32; leaving age = 36.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 10 people has average age 32. One person leaves and another aged 24 joins; the new average becomes 31. What was the age of the person who left?
A. 32 years
B. 36 years
C. 34 years
D. 38 years
Correct Answer: C
Old total + 24 − leaving age = 10×31; leaving age = 34.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 9 people has average age 31. One person leaves and another aged 23 joins; the new average becomes 30. What was the age of the person who left?
A. 30 years
B. 34 years
C. 32 years
D. 36 years
Correct Answer: C
Old total + 23 − leaving age = 9×30; leaving age = 32.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
A group of 8 people has average age 30. One person leaves and another aged 22 joins; the new average becomes 29. What was the age of the person who left?
A. 28 years
B. 34 years
C. 32 years
D. 30 years
Correct Answer: D
Old total + 22 − leaving age = 8×29; leaving age = 30.