model 7 marks scored in examinations Section-Wise Topic Notes With Detailed Explanation And Example Questions
MOST IMPORTANT quantitative aptitude - 11 EXERCISES
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The following question based on percentage topic of quantitative aptitude
(a) 66%
(b) 67%
(c) 60%
(d) 72%
The correct answers to the above question in:
Answer: (b)
46% of 500 = ${500 × 46}/100 = 230$
32% of 300 = ${300 × 32}/100 = 96$
Required marks = 230 – 96 = 134
Let x% of 200 = 134
${200 × x}/100 = 134$
2x = 134 ⇒ x = $134/2$ = 67%
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Read more marks and examinations Based Quantitative Aptitude Questions and Answers
Question : 1
A candidate who gets 20% marks in an examination fails by 30 marks but another candidate who gets 32% gets 42 marks more than the passing marks. Then the percentage of pass marks is :
a) 33%
b) 50%
c) 25%
d) 52%
Answer »Answer: (c)
Difference of percentages of maximum marks obtained by two candidates = 32% – 20% = 12%
Difference of scores between two candidates = 30 +42 = 72
12% of maximum marks = 72
Maximum marks = ${72 × 100}/12$ = 600
Pass marks = 20% of 600 + 30
= 120 + 30 = 150
Required percentage = $150/600 × 100 = 25%$
Using Rule 22,
An examinee scored m% marks in an exam and failed by p marks. In the same examination, another examinee obtained n% marks and passed with q more marks than the minimum, then
∴ Maximum marks = $100/(n -m) × (p + q)$
n = 32%, m=20%, p=30, q = 42.
Full Marks = $100/{n – m} × (p + q)$
= $100/{(32 - 20)} × (30 + 42)$
= $100/32 × 72$ = 600
Pass marks =20% of 600 + 30
= 120 + 30 = 150
Required percentage = $150/600 × 100$ = 25%
Question : 2
In an examination 80% of the boys passed in English and 85% passed in Mathematics, while 75% passed in both. If 45 boys failed in both, the number of boys who sat for the examination was
a) 200
b) 450
c) 150
d) 400
Answer »Answer: (b)
Successful boys in English or Maths or both
= 80 + 85 – 75 = 90%
Unsuccessful boys = 10%
Total number of boys = $100/10 × 45$ = 450
Question : 3
In the annual examination Mahuya got 10% less marks than Supriyo in Mathematics. Mahuya got 81 marks. The marks of Supriyo are
a) 88
b) 87
c) 89
d) 90
Answer »Answer: (d)
Let marks obtained by Supriyo = x
${9x}/10 = 81 ⇒ x = {81 × 10}/9 = 90$
Question : 4
72% of the students of a certain class took Biology and 44% took Mathematics. If each student took at least one subject from Biology or Mathematics and 40 took both, then the total number of students in the class is :
a) 250
b) 240
c) 320
d) 200
Answer »Answer: (a)
Let the number of students in the class be 100.
Number of students in Biology = 72 and number of students in Maths = 44.
Number of students opting for both subjects = 72 + 44 – 100 = 16
Since, When 16 students opt for both subjects, total number of students = 100
When 40 students opt for both subjects,
total number of students = $100/16 × 40$ = 250
Question : 5
In an examination, 60% of the candidates passed in English and 70% of the candidates passed in Mathematics, but 20% failed in both of these subjects. If 2500 candidates passed in both the subjects, the number of candidates who appeared at the examination was
a) 4000
b) 3500
c) 5000
d) 3000
Answer »Answer: (c)
Let the total number of candidates = x
Number of candidates passed in English = 0.6x
Number of candidates passed in Maths = 0.7x
Number of candidates failed in both subjects = 0.2x
Number of candidates passed in atleast one subject
= x – 0.2x = 0.8x
0.6 x + 0.7x – 2500 = 0.8 x
1.3x – 0.8x = 2500
0.5x = 2500 ⇒ $x = 2500/0.5 = 5000$
Question : 6
A student has to secure 40% marks to pass. He gets 90 marks and fails by 10 marks. Maximum marks are :
a) 250
b) 225
c) 275
d) 200
Answer »Answer: (a)
Let the maximum marks be x.
According to the question,
40% of x = 90 + 10
x = ${100 × 100}/40 = 250$
Using Rule 24,
a = 40%, b = 90, c = 10
Maximum marks = ${(b + c)}/a × 100$
= ${(90 + 10)}/40 × 100 = 250$
GET percentage PRACTICE TEST EXERCISES
model 1 simple percentage questions
model 2 net increase or decrease in %
model 3 reducing & exceeding prices
model 4 x & y comparison
model 5 income & expenditure
model 6 consumption & remaining
model 7 marks scored in examinations
Model 8 population based
model 9 voters & election
model 10 percentage with allegations & mixture
model 11 percentage with ratios
percentage Shortcuts and Techniques with Examples
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model 1 simple percentage questions
Defination & Shortcuts … -
model 2 net increase or decrease in %
Defination & Shortcuts … -
model 3 reducing & exceeding prices
Defination & Shortcuts … -
model 4 x & y comparison
Defination & Shortcuts … -
model 5 income & expenditure
Defination & Shortcuts … -
model 6 consumption & remaining
Defination & Shortcuts … -
model 7 marks scored in examinations
Defination & Shortcuts … -
Model 8 population based
Defination & Shortcuts … -
model 9 voters & election
Defination & Shortcuts … -
model 10 percentage with allegations & mixture
Defination & Shortcuts … -
model 11 percentage with ratios
Defination & Shortcuts …
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