Percentages Quiz Set 005 | Maths Aptitude Quiz Questions and Mock Test on Percentages Set 5 | mock tests for Bank PO, SSC Exams, SO Clerical Exam, GATE Exam, LIC AO, GIC AO, etc.

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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?

4500.

4600.

4400.

4700.

Soln.
Ans: a

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

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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?

51 %.

61 %.

41 %.

71 %.

Soln.
Ans: a

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

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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?

75 %.

77 %.

73 %.

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%.

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