Percentages Quiz Set 006

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Question 1

A carton contains 3000 led bulbs, some of them are red, some green and others are blue. How many are green if 19% are red and 15% are blue?

 A

1980.

 B

2080.

 C

1880.

 D

2180.

Soln.
Ans: a

The percentage of green is 100 - (19 + 15) = 66. So number of green bulbs = $66/100$ × 3000 = 1980.


Question 2

The age of Mr. X is 100% more than Mr. Y's age which is 20 years at present. By what percent is Y's age less than Mr. X's age?

 A

50 %.

 B

51 %.

 C

49 %.

 D

$17{2/3}$ %.

Soln.
Ans: a

Age of Mr. X is 20 + ${100 × 20}/100$ = 40 years. Mr. Y's age is less than Mr. X's age by ${100 × 20}/100$ = 20 years. In terms of percentage, it is $20/40$ × 100 = 50.


Question 3

A clerk multiplied a number by 5/3 instead of 3/5. What is the percentage of error?

 A

64 %.

 B

66 %.

 C

62 %.

 D

68 %.

Soln.
Ans: a

If the actual figure is x, the error is ${5x}/3$ - ${3x}/5$ = ${5^2x - 3^2x}/{5 × 3}$ = ${16x}/15$, so %-error = ${(16x)/15}/{(5x)/3}$ × 100 = ${16 × 3}/{15 × 5}$ × 100 = 64%.


Question 4

The service tax is 5%. A person receives a telephone bill amounting to Rs. 210. How much was the bill excluding tax?

 A

Rs. 200.

 B

Rs. 210.

 C

Rs. 190.

 D

Rs. 220.

Soln.
Ans: a

Let the calls be for Rs. x. The total bill is x + 5% of x = ${21x}/20 = 210$, which gives x = Rs. 200.


Question 5

If 65 is m% of p, and B is p% of m, then what is B?

 A

65.

 B

75.

 C

55.

 D

85.

Soln.
Ans: a

Let 65 = A, so A = $m/100$ × p = $p/100$ × m. = B, so A and B are same.


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Creative Commons License
This Blog Post/Article "Percentages Quiz Set 006" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2017-06-24.

Posted by Parveen(Hoven),
Aptitude Trainer


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