Hello Aspirants. Welcome to Online Quantitative Aptitude Section Section with explanation in **AffairsCloud.com.** Here we are creating question samples from **Percentage** with explanation, which is common for competitive exams. We have included some questions that are repeatedly asked in bank exams !!!

**Cost Price of two laptops is same. One of the laptops is sold at a profit of 15% and the Selling Price of another one laptop is Rs. 3400 more than the first one. The net profit is 20%. What is the Cost Price of Each laptop?**

A.36000

B.40000

C.48000

D.34000

E.None of these

**D.34000**

**Explanation:**

(2x*1.15) + 3400 = 2x*1.20

2.4x – 2.3x = 3400

x = 34000**In an office there are 40% female employees. 50% of the male employees are UG graduates. The total 52% of employees are UG graduates out of 1800 employees. What is the number of female employees who are UG graduates?**

A. 362

B. 412

C. 396

D. 428

E. None of these

**C. 396**

**Explanation:**

Total employees = 1800

female employees = 40%

male employees = 60%

50% of male employess = UG graduates = 30%

Female employees who are UG graduates = 22%

22% of 1800 = 396**Ravi got 70% in English and 56% in Biology and the maximum marks of both papers is 100. What percent does he score in Maths, if he scores 60% marks in all the three subjects?. Maximum Marks of Maths paper is 200.**

A. 30%

B. 40%

C. 45%

D. 25%

E. 57%

**E. 57%**

**Explanation:**

70 + 56 + x = 60% of all three subjects

70 + 56 + x = 60% of 400

x = 240 – 126 = 114

% = 114/200 * 100 = 57%**Ankita is 25 years old. If Rahul’s age is 25% greater than that of Ankita then how much percent Ankita’s age is less than Rahul’s age?**

A. 40%

B. 35%

C. 10%

D. 20%

E.None of these

**D. 20%**

**Explanation:**

Percentage decrease = 25/125 * 100 = 20%**Mr.Ravi’s salary was reduced by 25% for three months. But after the three months, his salary was increased to the original salary. What is the percentage increase in salary of Mr.Ravi?**

A. 33.33%

B. 42.85%

C. 28.56%

D. 16.66%

E. None of these

**A. 33.33%**

**Explanation:**

Percentage increase = 25/75 * 100 = 33.33%**In an election only two candidates A and B contested 30% of the voters did not vote and 1600 votes were declared as invalid. The winner, A got 4800 votes more than his opponent thus he secured 51% votes of the total voters on the voter list. Percentage votes of the loser candidate, B out of the total voters on the voter list is:**

A. 5.6%

B. 3%

C. 6.2%

D. 5%

E. 4.6%

**B. 3%**

**Explanation:**

Total voters on the voter list = x

0.51x + 0.51x – 4800 = 0.70x – 1600

1.02x – 4800 = 0.70x – 1600

x = 10000

Votes of the loser candidate = 5100 – 4800 = 300

Percentage votes of the loser candidate = 300/10000 * 100 = 3%**In a school there are 2000 students. On January 2nd, all the students were present in the school except 4% of the boys and on January 3rd, all the students are present in the school except 28/3% of the girls, but in both the days number of students present in the school, were same. The number of girls in the school is?**

A. 400

B. 1200

C. 800

D. 600

E. None of these

**D. 600**

**Explanation:**

From Options;

let Number of girls = 600

Number of boys = 1400

96% of 1400 + 600 = [600 – 28/3 % of 600] + 1400 = 1944[satisfies the condition; Check the condition with other options also]

**A school has raised 75% of the amount it needs for a new building by receiving an average donation of Rs. 1200 from the parents of the students. The people already solicited represents the parents of 60% of the students. If the School is to raise exactly the amount needed for the new building, what should be the average donation from the remaining students to be solicited?**

A. Rs.800

B. Rs.900

C. Rs.850

D. Rs.600

E. Rs.720

**D. Rs.600****Explanation:**

Let the number of parents be x who has been asked for the donations.

People already solicited = 60% of x = 0.6x

Remaining people = 40% of x = 0.4x

Amount collected from the parents solicited= 1200 *0.6x = 720x

720x = 75%; Remaining amount = 25% = 240x

Thus, Average donations from remaining parents = 240x /0.4x = 600**The monthly income of Shyama and Kamal together is Rs.28000. The income of Shyama and Kamal is increased by 25% and 12.5% respectively. The new income of Kamal becomes 120% of the new salary of Shyama. What is the new income of Shyama?**

A. Rs.12000

B. Rs.18000

C. Rs.14000

D. Rs.16000

E. Rs.15000

**E. Rs.15000**

**Explanation:**

The monthly income of Shyama and Kamal => S + K = 28000 —(1)

Shyama’s income = x; Kamal’s income = 28000 – x.

K = 120/100 * S —(2)

S’s new income = (28000 – x)*112.5/100

K’s new income = x * 125/100

(28000 – x)*112.5/100 = x * 125/100

x = 12000

New Income of Shyama = 125% of 12000 = 15000**500 kg of ore contained a certain amount of iron. After the first blast furnace process, 200 kg of slag containing 12.5% of iron was removed. The percentage of iron in the remaining ore was found to be 20% more than the percentage in the original ore. How many kg of iron were there in the original 500 kg ore?**

A. 54.2

B. 58.5

C. 46.3

D. 42.4

E. 89.2

**E. 89.2.**

**Explanation:**

Initially ‘x’ kg of iron in 500 kg ore.

Iron in the 200 kg of removed =200*12.5/100= 25 kg.

The percentage of iron in the remaining ore was found to be 20% more than the percentage in the original ore

So (x-25)/300 = (120/100)*x/500

=> x – 25 = 18x/25

=> 7x = 625

=> x = 89.2

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