model 1 basic average questions Practice Questions Answers Test with Solutions & More Shortcuts
average PRACTICE TEST [9 - 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
Question : 61 [SSC CHSL2015]
The mean high temperature of the first four days of a week is 25°C whereas the mean of the last four days is 25.5°C. If the mean temperature of the whole week is 25.2°C then the temperature on the 4th day is
a) 25.2°C
b) 25.6° C
c) 25°C
d) 25.5°C
Answer »Answer: (b)
Temperature on 4th day
= (4 × 25 + 4 × 25.5 –25.2 × 7)°C
= (100 + 102 – 176.4)°C
= 25.6°C
Question : 62 [SSC CAPFs SI, CISF 2014]
The average of all the numbers between 6 and 50 which are divisible by 5 is
a) 28.5
b) 22
c) 30
d) 27.5
Answer »Answer: (d)
Using Rule 1,
Average of two or more numbers/quantities is called the mean of these numbers, which is given by
$\text"Average(A)" = \text"Sumof observation / quantities"/\text"No of observation / quantities"$
∴ S = A × n
Numbers are : 10, 15, 20, 25, 30, 35, 40, 45
Sum = 220
Average = $220/8$ = 27.5
Question : 63
The average of n numbers $x_1 , x_2 , .... x_n$ is $\ov{x}$ . Then the value of $∑↙{i=1} ↖n $$(x_i - \ov{x})$ is equal to
a) n$\ov{x}$
b) $\ov{x}$
c) 0
d) n
Answer »Answer: (c)
Using Rule 1,
${x_1+x_2+…x_n}/n$ = $\ov{x}$
∴ $??{i=1}?n $$(x_i - \ov{x})$
= $(x_1 - \ov{x})$+$(x_2 - \ov{x})$+…$(x_n - \ov{x})$
= $({x_1+x_2+…+x_n})$ - n.$\ov{x}$
=n $({x_1+x_2+…+x_n}/n)$ - n.$\ov{x}$
= $n\ov{x} – n\ov{x}$ = 0
IMPORTANT quantitative aptitude 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 »
model 1 basic average questions Shortcuts »
Click to Read...model 1 basic average questions Online Quiz
Click to Start..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 …
quantitative aptitude CATEGORIES
RECENT BLOGS
![SSC CHSL 2023 Tier 2: Syllabus PDF & Exam Pattern [Changed]](https://careericons.com/adminicon/bunch/images/ssc-chsl-tier-2-2023-new-revised-syllabus-pdf-s.jpg "SSC CHSL 2023 Tier 2: Syllabus PDF & Exam Pattern [Changed]")
Recently Added Subject & Categories For All Competitive Exams
New 100+ Compound Interest MCQ with Answers PDF for IBPS
Compound Interest verbal ability questions and answers solutions with PDF for IBPS RRB PO. Aptitude Objective MCQ Practice Exercises all competitive exams
Continue Reading »
100+ Mixture and Alligation MCQ Questions PDF for IBPS
Most importantly Mixture and Alligation multiple choice questions and answers with PDF for IBPS RRB PO. Aptitude MCQ Practice Exercises all Bank Exams
Continue Reading »
IBPS Profit and Loss Questions Solved Problems with PDF
Most important Profit and Loss multiple choice questions and answers with PDF for IBPS RRB PO. 100+ Aptitude MCQ Practice Exercises all competitive exams
Continue Reading »
100+ Average Aptitude Questions Answers solutions MCQ PDF
New Average multiple choice questions and answers with PDF for IBPS RRB PO. 100+ Quantitative Aptitude MCQ Practice Exercises all competitive exams
Continue Reading »