Aptitude Percentage Test Paper 3

11) The population of a town is decreasing at a rate of 10% per annum. If the population two years ago was 20,000, what is the present population?

1. 15000
2. 15200
3. 16000
4. 16200

Correct answer; option (D)

Explanation:

Apply formula:

=16200

12) Two candidates contested an election. The winning candidate scored 54% and won by 88 votes. If 58 votes were declared invalid, find the total number of votes polled in the election?

1. 1042
2. 1100
3. 1158
4. 1188

Correct answer; option (C)

Explanation:

Let the valid votes = x

As per question; 54% of x-46% of x = 88

8% of x = 88

∴ Total votes polled = valid votes + invalid votes

= 1100 + 58 = 1158

13) 1200 boys and 800 girls appeared in an examination. If 60% of the boys and 40% of the girls passed the examination, what is the percentage of candidates who failed in the examination?

1. 48 %
2. 52 %
3. 45 %
4. 42 %

Correct answer; option (A)

Explanation:

Number of students failed = 40 % of boys (1200) + 60 % of girls (800)

= 480 + 480 = 960

Total number of students = 1200 + 800 = 2000

∴ Percentage of candidates failed = * 100

= * 100 = 48 %

14) In an examination, 25% candidates failed in English and 35 % students failed in Math.If 15 % candidates failed in both, what is the percentage of candidates who passed in both the subjects?

1. 45 %
2. 50 %
3. 55 %
4. 58 %

15) Naresh's monthly income is reduced by 15%. By what percentage his monthly income must be increased so that it is again equal to his original monthly income?

1. 16.6%
2. 15.6%
3. 14.6%
4. 17.6%

Correct answer; option (D)

Explanation:

Let Naresh's monthly income is x.

New income = x - 15% x

The income is reduced by ,So, should be added to his new income so that it becomes equal to his original monthly income.

∴ Required percentage increase in monthly income =* 100