percentage Model Questions & Answers, Practice Test for ssc cgl tier 2

Answer: (a)

30% of the residents are children.

∴ 30% of the total residents = 24

∴ Total number of residents in the society

= $24/30 × 100 = 80$

Answer: (a)

Percentage of income saved

= 100 – (45 + 30) = 25%

∴ 25% of x = 4500

x = 4500 × $100/25$ = 18000

Answer: (a)

Let the total number of original inhabitants be x.

Then, (100 – 25)% of (100 –10)% of x = 4050

⇒ $(75/100 × 90/100 × x) = 4050$

⇒ $27/40x = 4050$

⇒ $x = ({4050 × 40}/27) = 6000.$

∴ Number of original inhabitants = 6000.

Answer: (c)

Let the total number of students in the class be x.

Mathematics = ${72x}/100 - 40$

Biology = ${44x}/100 - 40$

Both = 40

${72x}/100 - 40 + 40 + {44x}/100 - 40 = x$

${72x}/100 + {44x}/100 - x = 40$

${(72 + 44 - 100)x}/100 = {16x}/100 = 40$

$x = {40 × 100}/16 = 250$

Answer: (a)

Let the cost price of the article be Rs. x

After 20% profit

${120x}/100 = 3600$ ⇒ x = 3000

Now, profit percentage, when the article is sold for Rs.3150

= ${3150 - 3000}/3000 × 100 = 150/3000 × 100$ = 5%