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

Answer: (a)

Let the original fraction be $x/y$.

Then, ${x + 5x}/{y + 3y} = 2{4}/7$

${6x}/{4y} = 18/7$

$x/y = 72/42 = 12/7$

Answer: (c)

$1/2$ of 3842 + 15% of ? = 2449

$1921 + x + 15/100 = 2449$

$x × 15/100$ = 2449 - 1921

$x = {528 × 100}/15$ = 3520

Answer: (c)

${a × a}/100 + {b × b}/100 = 2/100 ab$

$a^2 + b^2 = 2ab$

$a^2 + b^2 – 2ab$ = 0

$(a – b)^2$ = 0

a = b

∴ a is 100% of b

Answer: (a)

Total Expenditure = 2000 Rs.

Education Expenditure = 8000

Food Expenditure = 5900

Shopping Expenditure = 2800

Personal care Expenditure

= 20000 – (8000 + 5900 + 2800)

= 20000 – 16700 = 3300 Rs.

Percentage of expenditure on personal care

= $\text"Personal care expenditure"/\text"total expenditure" × 100$

= $3300/2000 × 100 = 16.5%$

∴ Option (b) is correct.

Answer: (c)

Number of girls = ${2500 × 20}/100$ = 500

Number of boys = 2000

Number of fail boys = ${2500 × 5}/100$ = 100

Number of fail girls = ${500 × 40}/100$ = 200

Total no. of pass students = 2500 – 300 = 2200

Pass % = $2200/2500 × 100$ = 88%