model 7 average on ages/weight Section-Wise Topic Notes With Detailed Explanation And Example Questions
MOST IMPORTANT quantitative aptitude - 9 EXERCISES
-
Basic Average Questions Practice Test, Shortcuts, Tricks, PDF »
-
New Average Aptitude MCQ Average of Consecutive Numbers »
-
Top 99+ Average Aptitude: Twice, One Third of Numbers MCQ »
-
New +99 Average Aptitude MCQ Find nth Average of Numbers »
-
99+ Average Aptitude Find New Average from Error MCQ Test »
-
Top 99+ Aptitude MCQ Test on Average With Excluded Number »
-
Top 99+ Aptitude Average on Ages & Weights MCQ Test Quiz »
-
Top Aptitude Average MCQ Find Monthly Income for Average »
-
Top 149+ Aptitude Average on Cricket & Exam MCQ Test Quiz »
The following question based on average topic of quantitative aptitude
(a) 32 years
(b) 35 years
(c) 29 years
(d) 30 years
The correct answers to the above question in:
Answer: (c)
Total age of 14 girls + 1 teacher = 15 × 15 = 225 yrs.
Average age of 14 girls = 14 yrs.
∴ Total age of 14 girls = 14 × 14 = 196 yrs.
∴ Teacher’s age = 225 – 196 = 29 yrs.
Discuss Form
Read more ages weights Based Quantitative Aptitude Questions and Answers
Question : 1
5 years ago, the average age of A, B, C and D was 45 years. With E joining them now, the average age of all the five is 49 years. How old is E ?
a) 40 years
b) 25 years
c) 64 years
d) 45 years
Answer »Answer: (d)
Sum of the present age of A, B, C and D
= 45 × 4 + 4 × 5 = 180 + 20 = 200 years
Sum of the present age of A, B, C, D and E = 49 × 5 = 245 years
∴ Present age of E = (245 – 200) years = 45 years
Question : 2
Out of 10 teachers of a school, one teacher retires and at his place a new teacher of age 25 years joins. As a result of it, the average age of the teachers is reduced by 3 years. The age of the retired teacher is
a) 58 years
b) 60 years
c) 55 years
d) 56 years
Answer »Answer: (c)
The average age is reduced by 3 years.
∴ Age of the retired teacher = 25 + 3 × 10 = 55 years
Question : 3
The average age of a husband and a wife was 27 years when they married 4 years ago. The average age of the husband, the wife and a new-born child is 21 years now. The present age of the child is
a) 3 years
b) 4 years
c) 1 year
d) 2 years
Answer »Answer: (c)
Sum of the present age of husband and wife
= 2 × 27 + 8 = 62 years
Sum of the present age of husband, wife and child
= 21 × 3 = 63 years
∴ present age of the child
= 63 – 62 = 1 year
Question : 4
The average age of 20 boys in a class is 12 years. 5 new boys are admitted to the class whose average age is 7 years. The average age of the boys in the class becomes
a) 9.5 years
b) 8.2 years
c) 11 years
d) 12.5 years
Answer »Answer: (c)
New average age of class
= ${20 × 12 + 5 × 7}/25$ = ${240+35}/25$
= $275/25$ = 11 years
Question : 5
In a class there are 30 boys and their average age is 17 years. On one boy aged 18 years leaving the class and another joining, the average age becomes 16.9 years. The age of new boy is
a) 11 years
b) 25 years
c) 15 years
d) 13 years
Answer »Answer: (c)
Age of new boy = 18 years – total decrease
= (18 – 0.1 × 30) years = 15 years
Aliter : Using Rule 23,
( If in a group, one member is replaced by a new member, then,
Age of new member = ( age of replaced member) ± xn
where, x = increase (+) or decrease (–) in average n = Number of members. )
Here, x = 17 – 16.9 = 0.1, n = 30
Age of new boy
= Age of replaced boy–xn
= 18 – 0.1 × 30
= 18 – 3 = 15 years
Question : 6
The average age of 40 students of a class is 18 years. When 20 new students are admitted to the same class, the average age of the students of the class is increased by 6 months. The average age of newly admitted student is
a) 19 years 6 months
b) 19 years
c) 20 years 6 months
d) 20 years
Answer »Answer: (a)
Total age of 20 new students
= (60 × 18.5 – 40 × 18) years
= (1110 – 720) years
= 390 years
∴ Their average age = $390/20$ = 19.5 years
= 19 years 6 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
-
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 …
Verbal Reasoning
Question & Answer Quiz
Non Verbal Reasoning
Question & Answer Quiz
Quantitative Aptitude
Question & Answer Quiz
Computer MCQ
Question & Answer Quiz
General English
Question & Answer Quiz
History GK
Question & Answer Quiz
Polity GK
Question & Answer Quiz
Geography GK
Question & Answer Quiz
Economy GK
Question & Answer Quiz
General Awareness GK
Question & Answer Quiz
Recently Added Subject & Categories For All Competitive Exams
Most Important Antonyms Vocabulary - IBPS Clerk Prelims 2024
Latest Antonyms multiple choice questions and answers with free PDFfor IBPS Clerk Prelims 2024. English Vocabulary practice exercise for all bank exam
Continue Reading »
Syllogism Practice Questions Answers PDF - IBPS Clerk 2024
Practice Verbal Reasoning Syllogism multiple choice questions and answers with Fully solved explanation, PDF for the IBPS Clerk Prelims 2024 Bank Exam
Continue Reading »
IBPS Clerk Prelims 2024 Synonyms Questions Solved Answers
Most important IBPS Clerk Prelims 2024 Synonyms and Antonyms multiple choice questions and answers with detailed solutions, English vocabulary PDF Download
Continue Reading »
New Cloze Test Questions and Answers PDF - IBPS Clerk 2024
The most important Cloze Test questions with detailed answers for upcoming IBPS Clerk prelims 2024. Latest English verbal ability practice MCQs, PDF
Continue Reading »