Percentages Quiz Set 005

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Question 1

A carton contains 5000 led bulbs, some of them are red, some green and others are blue. How many are green if 6% are red and 4% are blue?

 A

4500.

 B

4600.

 C

4400.

 D

4700.

Soln.
Ans: a

The percentage of green is 100 - (6 + 4) = 90. So number of green bulbs = $90/100$ × 5000 = 4500.


Question 2

A bag contains 780 red, 2160 green and 3060 blue marbles. What percentage of the total is the most visible color in the bag?

 A

51 %.

 B

61 %.

 C

41 %.

 D

71 %.

Soln.
Ans: a

By inspection, blue is the most visible color. The percentage of blue is $3060/{780 + 2160 + 3060}$ × 100 = 51%.


Question 3

A sample of alcohol has 80% water, and another sample has 70% water. If equal volumes of both the samples are combined, what is the percentage of water in the new sample?

 A

75 %.

 B

77 %.

 C

73 %.

 D

79 %.

Soln.
Ans: a

If 100 units of both alcohol are combined, there will be 150 units of water in 200 units of the new sample. The percentage of water is $150/200$ × 100 = 75%.


Question 4

A carton contains 8000 led bulbs, some of them are red, some green and others are blue. How many are green if 3% are red and 5% are blue?

 A

7360.

 B

7460.

 C

7260.

 D

7560.

Soln.
Ans: a

The percentage of green is 100 - (3 + 5) = 92. So number of green bulbs = $92/100$ × 8000 = 7360.


Question 5

One number is 300 more than the other, and it is 75% of the sum of them. What is the number?

 A

450.

 B

550.

 C

350.

 D

650.

Soln.
Ans: a

Let the numbers be x and x - 300. We have been given x = $75/100$ × (x + x - 300), which gives 100x = 75 × (2x - 300), solving, we get x = 450.


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This Blog Post/Article "Percentages Quiz Set 005" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2017-10-26.

Posted by Parveen(Hoven),
Aptitude Trainer


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