Prev Next
Percentages ( 16 to 20 ):
APTITUDE QUESTIONS (PERCENTAGES):
16. The population of a town increased from 1, 75,000 to 2, 62,500 in a decade. What is the average percent increase in population per year?
A) 4.37%
B) 5%
C) 6%
D) 8.75%
E) None of these
View Answer
Answer: option (B)
Explanation:
Increase in 10 years = (262500 – 175000) = 87500
Increase% = (87500/175000*100)%= 50%
∴ Required average = (50/10)%=5%
17. After deducting a commission of 5%, a T.V set costs Rs.9595. Its market price is:
A) Rs.10000
B) Rs. 10075
C) Rs.10100
D) Rs.10500
E) None of these
View Answer
Answer: option (C)
Explanation:
Let the market price be x
Then, x – 5% of x = 9595 95% of x = 9595 x = ((9595*100)/95)=10100
18. A student has to obtain 33% of the total marks to pass. He got 120 marks and failed by 45 marks. The maximum marks are:
A) 300
B) 500
C) 600
D) 700
E) None of these
View Answer
Answer: option (B)
Explanation:
Let the maximum marks be x
Then, 33% of x = 120 + 45 (33/100)x= 165 x = ((165*100)/33)= 500
19. 1100 boys and 700 girls are examined in a test. 32% of the boys and 20% of the girls pass. The percentage of the total who failed is:
A) 58%
B) 72(12/18)%
C) 64%
D) 78%
E) None of these
View Answer
Answer: option (B)
Explanation:
Total number of students = 1100 + 700 = 1800
Number of students passed = (32% of 1100 + 20% of 700) = 352 + 140 = 492
Number of failures = 1800 – 492 = 1308
∴Percentage failure = (1308/1800*100)%= 72(12/18)%
20. If 20% of a = b, then b% of 20 is the same as:
A) 4% of a
B) 5% of a
C) 20% of a
D) 10% of a
E) None of these
View Answer
Answer: option (A)
Explanation:
20% of a = b => (20/100) a=b
∴b% of 20 = (b/100*20)= ((20/100) a*1/100*20)= (4/100) a=4% of a