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 !!!

**In a class of 60 students , 40% of the students passed in Reasoning, 5% of the students failed in Quants and Reasoning, and 20% of the students passed in both the subjects. Find the number of student passed only in Quants?**

1.17

2.33

3.23

4.37

5.None of these

Answer –**2.33**

**Explanation :**

Total students=60

Failed in both=5% of 60=3

Passed in both=20% of 60=12

Passed in reasoning=50% of 60=24

Those passed only in reasoning =24-12=12 students.

Passed only in Quants=60-(12+12+3)=33

**The maximum marks per paper in 3 subjects in Mathematics , Physics and Chemistry are set in the ratio 1 : 2 : 3 respectively. Giri obtained 40% in Mathematics, 60% in Physics and 35% in Chemistry papers. What is overall percentage marks did he get overall?**

1.44%

2.32%

3.50%

4.60%

5.None of these

Answer –**1.44%**

**Explanation :**

40*1/100 : 60*2/100 : 35*3/100 = 0.4:1.2:1.05

Overall % =100* [0.4+1.2+1.05]/1+2+3 = 265/6 = 44.16 = 44%

**In an examination, 50% of the students passed in Science and 75% passed in Social, while 20% students failed in both the subjects. If 270 students passed in both subjects, find the total number of students who appeared in the exam?**

1.400

2.540

3.600

4.750

5.None of these

Answer – 3.600 Explanation :

passed in science = 50%

passed in social = 75%

20% students failed in both the subjects and 80% passed in at least one subject

No of students passed in both subjects = 50+75−x=80 x=45% 45% of x = 270 x = 270*100/45 = 600

Total number of students =600

**Fresh fruits contain 75% while dry fruits contain 20% water. If the weight of dry fruits is 300 kg, what was its total weight when it was fresh?**

1.900kg

2.850kg

3.920kg

4.960kg

5.None of these

Answer –**4.960kg**

**Explanation :**

Quantity of water in 300 kg dry fruits, = (20 /100) *300 = 60 kg

Quantity of fruit alone= 300-60 =240 kg

25 kg fruit piece in 100 kg fresh fruits

For 240 = (100 *240)/25 = 960 kg.

**In a college election 35% voted for Person A, whereas 42% voted for Person B. The remaining people were not vote to any person. If the difference between those who vote for Person B in the election and those who are uncertain was 570, how many people are participated in the college election?**

1.1500

2.2000

3.2100

4.1700

5.None of these

Answer –**2.3000**

**Explanation :**

Let the number of individuals involved in election be x.

Percentage of those who were not vote = 100-(35+42) = 23%

The difference between those who voted

42% of x – 23% of x = 570

19% of x = 570

x=570*100/19 = 3000

**In a factory there are three types of bulbs L1, L2 and L3 which produces 20%, 15% and 32% of the total products respectively. L1, L2 and L3 produces 3%, 7% and 2% defective products, respectively. Find the percentage of non-defective products ?**

1.46%

2.30%

3.53%

4.64%

5.None of these

Answer –**4.64%**

**Explanation :**

(20*0.97)+(15*0.93)+(32*0.98) = 19.4+13.95+31.36

= 64.71

**In a class of 500 students ,65% are boys. 20% of the girls and 40% of the boys failed the exam.Find the of students in the school passed the exam?**

1.335

2.270

3.400

4.362

5.None of these

Answer –**1.335**

**Explanation :**

Total students are 100% = 500

Boys = 65% of 500 = 325,

Girls = 35% =35*500/100 =175

Girls failed in the exam= 175*80/100 = 140

Boys failed in the exam =40/100x 325 = 195

Total = 140+195 = 335

**The population of village increases at the rate of 6% per annum. There is an additional increase of 2% in the population due to rural development .Therefore the percentage increase in the population after 2 years will be**

1.15.46%

2.16.64%

3.14.46%

4.12.56%

5.None of these

Answer –**2.16.64%**

**Explanation :**

Total increase = 6+2 = 8%

% increase = 8+8+(8*8/100) = 16+0.64 = 16.64%

**The total salary of Guagn and Harish in an organization is Rs 30000. If the salary of Gugan increase by 5% and salary of Harish increase by 7%, then their total salary would increase to Rs 31800. Find the salary of Harish ?**

1.Rs.10,000

2.Rs.15,000

3.Rs.18,000

4.Rs.12,000

5.None of these

Answer –**2.Rs.15,000**

**Explanation :**

7% increases 30000 = Rs 2100 =30000+2100 = Rs 32,100

But the actual increase in salary = 31800

Difference =32100 – 31800 = 300

2% = 300

Gugan’s salary =300/2 x 100 = 15000

Harish’s salary =30000 – 15000 = Rs 15000

**In an examination 70% candidates passed in prelims and 55% candidates passed in Mains. If 62% candidates passed in both these subjects, then what per cent of candidates failed in both the exams?**

1.37%

2.26%

3.43%

4.15%

5.None of these

Answer –**1.37%**

**Explanation :**

Students passed in Prelims = 70%

Students passed in Mains = 55%

Students passed in both = 62%

No of students passed in at least one subject = (70+55)-62 = 63%.

students failed in both subjects = 100-63 = 37%.

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