model 1 basic average questions 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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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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The following question based on average topic of quantitative aptitude
(a) Rs.35
(b) Rs.34
(c) Rs.37
(d) Rs.38
The correct answers to the above question in:
Answer: (b)
Total cost price of 20kg of mixed rice
Rs. (12 × 30 + 8 × 40) = Rs.680
∴ Average per kg price = $680/20$ = Rs.34
Aliter : Using Rule 2,
$x_1$ = 12, $A_1$ = 30
$x_2$ = 8, $A_2$ = 40
∴ Average = ${A_1x_1 + A_2x_2}/{x_1+x_2}$
${30×12+40×8}/{12+8}$
${360+320}/20$
= $680/20$
= Rs.34
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Read more simple average Based Quantitative Aptitude Questions and Answers
Question : 1
4 boys and 3 girls spent Rs.120 on the average, of which boys spent Rs.150 on the average. Then the average amount spent by the girls is
a) Rs.90
b) Rs.100
c) Rs.60
d) Rs.80
Answer »Answer: (d)
Total expenditure = 120 × 7 = Rs. 840
Total expenditure of 4 boys = 150 × 4 =Rs. 600
Total expenditure of 3 girls = 840 – 600 = Rs. 240
∴ Their average expenditure
= $240/3$ = Rs. 80
Question : 2
The average of 10 numbers is 7. If each number is multiplied by 12, then the average of the new set of numbers will be
a) 82
b) 84
c) 19
d) 7
Answer »Answer: (b)
If each number is multiplied by a certain number, then the average is also multiplied by that number.
∴ Required average =7×12 = 84
Question : 3
The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight (in kg) of B is
a) 31
b) 17
c) 26
d) 20
Answer »Answer: (a)
Weight of B = (A + B)’s weight + (B + C)’s weight – (A + B + C)’s weight
= 40 × 2 + 43 × 2 – 45 × 3
= 80 + 86 – 135
= 166 – 135 = 31 kg
Question : 4
The average of 8 numbers is 27. If each of the numbers is multiplied by 8, find the average of new set of numbers.
a) 316
b) 216
c) 938
d) 1128
Answer »Answer: (b)
If each item is multiplied by 8, their average gets multiplied by 8.
∴ Required average
= 8 × 27 = 216
Question : 5
The average weight of five persons sitting in a boat is 38 kg. The average weight of the boat and the persons sitting in the boat is 52kg. What is the weight of the boat ?
a) 232 kg
b) 242 kg
c) 122 kg
d) 228 kg
Answer »Answer: (c)
Weight of the boat
= 6 × 52 – 5 × 38
= 312 – 190 = 122 kg
Question : 6
The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is :
a) 29.5 kg.
b) 35 kg.
c) 32 kg.
d) 31 kg.
Answer »Answer: (d)
B’s weight = (A + B)’s weight + (B + C)’s weight – (A + B + C)’s weight
= (40 × 2 + 2 × 43 – 45 × 3) kg.
= (80 + 86 – 135) kg.
= 31 kg.
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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