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Quant practice set 24 for sbi po prelim 2020 ( Percentage )



SBI Clerk and SBI PO Prelims exam are going to be held in the upcoming months. We have already provided you with the PDFs of many topics of Quantitative Aptitude like Simplification/Approximation, Number Series,datainterpretation.important Arithmetic questions to prepare for SBI Clerk and PO Pre exam. Practicing these questions will help you to know about the level of the questions. To increase your speed and accuracy, enhance your calculations.

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  Percentage Questions

 1.1.Inn election between two candidates, one got 55% of the total valid votes, 20% of the votes were invalid. If the total number of votes was 7500, the number of valid votes that the other candidate got, was :
A) 2500
B) 2700
C) 2900
D) 3100

2.Fresh fruit contains 68% water and dry fruit contains 20% water. How much dry fruit can be obtained from 100 kg of fresh fruits ?
A) 20
B) 30
C) 40
D) 50

3.The value of a machine depreciates at the rate of 10% every year. It was purchased 3 years ago. If its present value is Rs. 8748, its purchase price was :
A) 10000
B) 12000
C) 14000
D) 16000

4.405 sweets were distributed equally among children in such a way that the number of sweets received by each child is 20% of the total number of children. How many sweets did each child recieve ?
A) 9
B) 10
C) 11
D) 12

5.Gaurav spends 30% of his monthly income on food articles, 40% of the remaining on conveyance and clothes and saves 50% of the remaining. If his monthly salary is Rs. 18,400, how much money does he save every month ?
A) 3864
B) 4903
C) 5849
D) 6789

6.A salesman gets commission on total sales at 9%. If the sale is exceeded Rs.10,000 he gets an additional commission as bonus of 3% on the excess of sales over Rs.10,000. If he gets total commission of Rs.1380, then the bonus he received is:
A) Rs.180
B) Rs.120
C) Rs.480
D) data insufficient

7.In an election only two candidates contested 20% of the voters did not vote and 120 votes were declared as invalid. The winner got 200 votes more than his opponent  thus he secured 41% votes of the total voters on the voter list. Percentage votes of the defeated candidate out of the total votes casted is:
A) 47.5%
B) 41%
C) 38%
D) 45%

8.A housewife saved Rs. 2.50 in buying an item on sale. If she spent Rs. 25 for the item, approximately how much percent she saved in the transaction ?
A) 8
B) 9
C) 10
D) 11


9.The population of a town was 1,60,000 three years ago, If it increased by 3%, 2.5% and 5% respectively in the last three years, then the present population in
A) 155679
B) 167890
C) 179890
D) 177366

10.In a History examination, the average for the entire class was 80 marks. If 10% of the students scored 35 marks and 20% scored 90 marks, what was the average marks of the remaining students of the class ?
A) 25
B) 50
C) 75
D) 100


SOLUTIONS:


1.Answer: B) 2700
Explanation:
Total number of votes = 7500
Given that 20% of Percentage votes were invalid
 => Valid votes = 80%
 Total valid votes = 7500*(80/100)
1st candidate got 55% of the total valid votes.
Hence the 2nd candidate should have got 45% of the total valid votes
=> Valid votes that 2nd candidate got = total valid votes x (45/100)
7500*(80/100)*(45/100) = 2700

2.
Given, fresh fruit has 68% water.so remaining 32% is fruit content. weight of fresh fruits is 100kg
Dry fruit has 20% water.so remaining 80% is fruit content.let weight if dry fruit be y kg.
Fruit % in freshfruit = Fruit% in dryfruit
Therefore, (32/100) x 100 = (80/100 ) x y
we get, y = 40 kg.

3.











4.Explanation:
Let the total number of children be x.
Then, x * (20% of x) = 405
=> x * 20x/100 = 405
15x2 = 405
=> x=45
Number of sweets received by each child = 20% of 45 = 9.

5.Answer: A) 3864
Explanation:
Saving  = 50% of (100 - 40)% of (100 - 30)% of Rs. 18,400 = Rs. (50/100 * 60/100 * 70/100 * 18400) = Rs. 3864.

6.





















7.Explanation:
Let there be x voters and k votes goes to loser then
      0.8x - 120 = k + (k + 200)
     k+200 = 0.41x
 => k = 1440
and  (k + 200) =1640
Therefore  1440/3200 x 100 = 45%

8.Explanation:
Actual price = Rs. (25 + 2.50) = Rs. 27.50.
Saving = 2.50
Percentage Saving = [(2.50/27.50)*100]
= 2500/275
= 9111%
≈9%

9.Answer: D) 177366
Explanation:
Present population =  160000 *  (1 + 3/100)(1 + 5/200)(1 + 5/100)= 177366

10.Explanation:
Let the number of students in the class be 100 and let this required average be x.
Then, (10 * 95) + (20 * 90) + (70 * x) = (100 * 80)
=> 70x = 8000 - (950 + 1800) = 5250
=> x = 75