model 1 simple percentage questions Section-Wise Topic Notes With Detailed Explanation And Example Questions

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The following question based on percentage topic of quantitative aptitude

Questions : In a school 40% of the students play football and 50% play cricket. If 18% of the students neither play football nor cricket, the percentage of the students playing both is :

(a) 22%

(b) 8%

(c) 40%

(d) 32%

The correct answers to the above question in:

Answer: (b)

Since 18% of the students neither play football nor cricket. It means 82% of the students either play football or cricket or both.

Using set theory

n(A ? B) = n(A) + n(B) – n(A ? B)

82 = 40 + 50 – n(A ? B)

n(A ? B) = 90 – 82 = 8

8% students play both games.

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Read more simple percentage Based Quantitative Aptitude Questions and Answers

Question : 1

In a big garden 60% of the trees are coconut trees, 25% of the number of coconut trees are mango trees and 20% of the number of mango trees are apple trees. If the number of apple trees are 1500, then the number of trees in the garden is :

a) 51000

b) 45000

c) 48000

d) 50000

Answer: (d)

If the number of trees in the garden be x, then

$x × 60/100 × 25/100 × 20/100 = 1500$

$x × 3/5 × 1/4 × 1/5 = 1500$

$x = {1500 × 5 × 4 × 5}/3$

= 50000

Question : 2

Half of 1 per cent, written as a decimal, is

a) 0.005

b) 0.05

c) 0.2

d) 0.02

Answer: (a)

1% = $1/100$

$1/100 × 1/2 = 1/200 = 0.005$

Question : 3

If 30% of A is added to 40% of B, the answer is 80% of B. What percentage of A is B?

a) 70%

b) 75%

c) 30%

d) 40%

Answer: (b)

$A × 30/100 + {B × 40}/100 = {B × 80}/100$

A × 30 = B × 40

$A/B = 40/30 = 4/3$

$B/A = 3/4$

$B/A × 100 = 3/4$ × 100 = 75%

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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
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