percentages Model Questions & Answers, Practice Test for ssc cgl tier 1 2023
ssc cgl tier 1 2023 SYLLABUS WISE SUBJECTS MCQs
Number System
Ratio Proportion & Partnership
Averages
Percentages
Profit & Loss
Time & Work
Time & Distance
Simple Interest & Compound Interest
Mensuration: Area & Volumes
Algebraic Expressions
Linear Equations
Squareroots & Cuberoots
Chunilal invests 65% in machinery, 20% in raw material and still has Rs. 1,305 cash with him. Find his total investment.
Answer: (d)
Let he had originally Rs. x.
Then 65% of x + 20 % of x + 1305 = x
0.65x + 0.2 x + 1305 = x
0.15 x = 1305 ⇒ x = Rs. 8700
∴ His total investment = 65% of 8700 + 20% of 8700
= 85% of 8700 = Rs. 7395
The total population of a village is 5000. The number of males and females increases by 10% and 15% respectively and consequently the population of the village becomes 5600. What was the number of males in the village?
Answer: (b)
Let the number of males be x.
Then, number of females = (5000 – x).
∴ 10% of x + 15% of (5000 – x) = (5600 –5000)
$10/100x + 15/100(5000 - x) = 600$
⇒ 10x + 75000 - 15x = 60000.
⇒5x = 15000
x = 3000.
If 50% of (x – y) = 40% of (x + y), then what per cent of x is y?
Answer: (a)
Given that, 50% of (x - y) = 40% of (x + y)
$50/100 × (x - y) = 40/100 × (x + y)$
5x - 5y = 4x + 4y
x = 9y ...(i)
Let r % of x = y
$r/100 × 9y = y$ [from Eq. (i)]
∴r = $100/9 = 11{1}/9 %$
Mr. Nair's monthly salary is Rs.22,500. He took a loan of Rs.30,000 on simple interest for 3 years at the rate of 5 p.c.p.a The amount that he will be paying as simple interest in 3 years is what percent of his monthly salary?
Answer: (b)
SI = ${30,000 × 3 × 5}/100 = 4500$
x% of 22,500 = 4500
$x = {4500 × 100}/{22,500}$ = 20%
The population of a town was 48600. It increased by 25% in the first year and decreased by 8% in the second year. What will be the population of the town at the end of 2 years?
Answer: (e)
Population after two years
= $48600 × 125/100 × 92/100$ = 55890
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