percentages Model Questions & Answers, Practice Test for ssc chsl tier 1 2023

Question :11

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

Question :12

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

Question :13

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

Question :14

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

∴ ? = ${74.245 × 100}/0.5 = 14849$

Question :15

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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