model 7 average on ages/weight Section-Wise Topic Notes With Detailed Explanation And Example Questions
MOST IMPORTANT quantitative aptitude - 9 EXERCISES
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Basic Average Questions Practice Test, Shortcuts, Tricks, PDF »
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New Average Aptitude MCQ Average of Consecutive Numbers »
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Top 99+ Average Aptitude: Twice, One Third of Numbers MCQ »
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New +99 Average Aptitude MCQ Find nth Average of Numbers »
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99+ Average Aptitude Find New Average from Error MCQ Test »
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Top 99+ Aptitude MCQ Test on Average With Excluded Number »
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Top 99+ Aptitude Average on Ages & Weights MCQ Test Quiz »
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Top Aptitude Average MCQ Find Monthly Income for Average »
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Top 149+ Aptitude Average on Cricket & Exam MCQ Test Quiz »
The following question based on average topic of quantitative aptitude
(a) 18, 20, 22
(b) 18, 22, 20
(c) 22, 20, 18
(d) 22, 18, 20
The correct answers to the above question in:
Answer: (d)
A + B = 2 × 20 = 40
C + B = 2 × 19 = 38
C + A = 2 × 21 = 42
On adding all three,
2 (A + B + C) = 40 + 38 + 42 = 120
⇒ A + B + C = 60
∴ A = (A + B + C) – (B + C)
= 60 – 38 = 22 years
B = (A + B + C) – (A + C)
= 60 – 42 = 18 years
C = (A + B + C) – (A + B)
= 60 – 40 = 20 years
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Read more ages weights Based Quantitative Aptitude Questions and Answers
Question : 1
The average age of a husband and his wife was 23 years at the beginning of their marriage. After five years they have a one-year old child. The average age of the family of three, when the child was born, was
a) 24 years
b) 23 years
c) 20 years
d) 18 years
Answer »Answer: (d)
After five years of marriage,
Husband + wife + child
= 46 + 10 + 1 = 57 years
At the time of birth of child,
Husband + wife + child = 57 – 3 = 54 years
∴ Required average age = $54/3$ = 18 years
Question : 2
5 years ago, the average age of P and Q was 15 years. Average age of P, Q and R today is 20 years. How old will R be after 10 years?
a) 40 years
b) 35 years
c) 50 years
d) 30 years
Answer »Answer: (d)
Present age of (P + Q) = 30 + 10 = 40 years
(P + Q + R)’s present age = 20 × 3 = 60 years
R’s present age = 60 – 40 = 20 years
∴ R’s age after 10 years = 20 + 10 = 30 years
Question : 3
In a family, the average age of a father and a mother is 35 years. The average age of the father, mother and their only son is 27 years. What is the age of the son ?
a) 11 years
b) 12 years
c) 10 years
d) 10.5 years
Answer »Answer: (a)
Father + mother = 2 × 35 = 70 years
Father + mother + son = 27 × 3 = 81 years
∴ Son’s age = 81 – 70 = 11 years
Question : 4
The average age of 24 boys and their teacher is 15 years. When the teacher’s age is excluded, the average age decreases by 1 year. The age of the teacher is
a) 39 years
b) 38 years
c) 41 years
d) 40 years
Answer »Answer: (a)
The age of the teacher
= (24 + 1) × 15 – 24 × (15 – 1)
= 25 × 15 – 24 × 14
= 375 – 336 = 39 years.
Question : 5
The average age of 11 players of a cricket team is increased by 2 months when two of them aged 18 years and 20 years are replaced by two new players. The average age of the new players is
a) 19 years 6 months
b) 19 years 1 month
c) 19 years 5 months
d) 19 years 11 months
Answer »Answer: (d)
Total increase = 11 × 2 = 22 months
∴ Sum of the age of both cricketers
= (18 + 20) years 22 months
= 38 years 22 months
∴ Average age =19 years 11 months
GET average PRACTICE TEST EXERCISES
model 1 basic average questions
model 2 average of consecutive numbers
model 3 twice, thrice, one third etc. of numbers
model 4 find nth average from 1st & last number
model 5 find new average from error
model 6 find average of excluded number
model 7 average on ages/weight
model 8 find monthly income
model 9 average on cricket/exam
average Shortcuts and Techniques with Examples
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model 1 basic average questions
Defination & Shortcuts … -
model 2 average of consecutive numbers
Defination & Shortcuts … -
model 3 twice, thrice, one third etc. of numbers
Defination & Shortcuts … -
model 4 find nth average from 1st & last number
Defination & Shortcuts … -
model 5 find new average from error
Defination & Shortcuts … -
model 6 find average of excluded number
Defination & Shortcuts … -
model 7 average on ages/weight
Defination & Shortcuts … -
model 8 find monthly income
Defination & Shortcuts … -
model 9 average on cricket/exam
Defination & Shortcuts …
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