percentages Model Questions & Answers, Practice Test for ssc chsl tier 1 2023
ssc chsl tier 1 2023 SYLLABUS WISE SUBJECTS MCQs
Number System
Simplification
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Ratio Proportion & Partnership
Percentages
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Time & Work
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Mensuration: Area & Volumes
The population of a town is 198000. It increases by 7% in the 1st year and decreases by 5% in the 2nd year. What is the population of the town at the end of 2 years?
Answer: (a)
Population of the town after 2 years
= $198000(1 + 7/100)(1 - 5/100)$
= ${198000 × 107 × 95}/{100 × 100}$ = 201267
Twenty five percent of Pranab’s annual salary is equal to eighty percent of Surya’s annual salary. Surya’s monthly salary is forty percent of Dheeru’s monthly salary. If Dheeru’s annual salary is Rs. 6 lacs,what is Pranab’s monthly salary ? (At some places annual income and in some place monthly income is given.)
Answer: (d)
Dhreeu's monthly salary
= $600000/12$ = Rs. 50000
Surya's monthly salary
= $50000 × 40/100$ = Rs. 20000
Pranab's monthly salary
= $20000 × 80/25$ = Rs. 64000
Kajal spends 55% of her monthly income on grocery, clothes and education in the ratio of 4 : 2 : 5 respectively. If the amount spent on clothes is Rs.5540/-, what is Kajal's monthly income?
Answer: (c)
Ratio of Expenses = 4 : 2 : 5,
therefore amount spend on clothes, i.e. 2x = 5540
∴ x = 2770
Total exp = (4 + 2 + 5)x = 11x
= 11 × 2770
Total income be x.
55% of x = 30470
$x=30470 × 100/20$ = 55400
4.78% of 1255 + 3.24% of 440 = 0.5% of ?
Answer: (a)
${0.5 × ?}/100 = {4.78 × 1255}/100 + {3.24 × 440}/100$ = 59.989 + 14.256
∴ ? = ${74.245 × 100}/0.5 = 14849$
A scooter costs Rs. 25, 000 when it is brand new. At the end of each year, its value is only 80% of what it was at the beginning of the year. What is the value of the scooter at the end of 3 years?
Answer: (c)
After first year, the value of the scooter = Rs. 20,000
After second year, the value of scooter = Rs. 16,000
After third year, the value of scooter = Rs. 12,800
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