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) 600
(b) 800
(c) 450
(d) 1200
The correct answers to the above question in:
Answer: (a)
According to question,
40% ⇒ 220 + 20 or 40% ⇒ 240
100% ⇒ $240/40 × 100 = 600$
Using Rule 24,
a = 40%, b = 220, c = 20
Total Marks = ${100(220 +20)}/40$
=${100 × 240}/40 = 600$
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Read more marks and examinations Based Quantitative Aptitude Questions and Answers
Question : 1
In an examination, 1100 boys and 900 girls appeared. 50% of the boys and 40% of the girls passed the examination. The percentage of candidates who failed
a) 50%
b) 45.5%
c) 54·5%
d) 45%
Answer »Answer: (c)
Failed candidates = ${1100 × 50}/100 + {900 × 60}/100$
= 550 + 540 = 1090
Required percentage = $1090/2000 × 100 = 54.5%$
Using Rule 25,
B = 1100, b = 50%, G = 900, g = 40%
Percentage of failed candidates = ${(Bb + Gg)}/{B + G}%$
= ${1100 × 50 + 900 × 40}/{1100 + 900}$
= ${55000 + 36000}/2000$
= $91/2$ = 45.5%
Question : 2
In two successive years 100 and 75 students of a school appeared at the final examination. Respectively, 75% and 60% of them passed. The average rate of pass is
a) 80$1/2$%
b) 78%
c) 80%
d) 68$4/7$%
Answer »Answer: (d)
Number of students passed in first year = 75
Number of students passed in second year
= ${60 × 75}/100 = 45$
Total number of passed students = 75+45=120
Total number of appeared students =175
∴ Required percentage
= $120/175 × 100 = 68{4}/7%$
Question : 3
In an examination 60% of the students pass in English, 70% pass in Hindi and 40% pass in both. What percent of students fail in both English and Hindi?
a) 25%
b) 20%
c) 30%
d) 10%
Answer »Answer: (d)
The percentage of students who pass in one or two or both subjects
= 60 + 70 – 40 = 90
Percentage of failed students = 100 – 90 = 10%
Question : 4
In an examination 34% failed in Mathematics and 42% failed in English. If 20% failed in both the subjects, the percentage of students who passed in both subjects was
a) 44%
b) 50%
c) 56%
d) 54%
Answer »Answer: (a)
Let total number of students = 100
Number of failures in Maths = 34
Number of failures in English = 42
Number of failures in both subjects = 20
Number of failures in Maths or English or both
= 34 + 42 – 20 = 56
Number of students who passed in both subjects
= 100 – 56 = 44
The required percentage = 44%
Using Rule 23,
a = 34%, b = 42%, c = 20%
Passed candidates in both the subjects
= 100 – (a + b – c)
= 100 – (34 + 42 – 20) = 100 – 56 = 44%
Question : 5
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 : 6
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
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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