Question: 16 -

A man spends 10% of his income in house rent, 20% of the rest on his children’s education, 25% of the rest miscellaneous causes. If he now posses Rs. 1944 then his income is? 

Rs. 3600

Rs. 3000

Rs. 4500

Rs. 4000

Answer:

Rs. 3600

Solution:

X * (90/100) * (80/100) * (75/100) = 1944
X * 0.9 * 0.8 * 0.75
X = 1944/0.54
X = 3600

Question: 17 -

In a factory, there are 40% technicians and 60% non-technicians. If the 60% of the technicians and 40% of non-technicians are permanent employees, then the percentage of workers who are temporary is? 

52%

62%

42%

32%

Answer:

52%

Solution:

Total = 100
T= 40                     NT= 60
40*(60/100)=24    60*(40/100)=24
24 + 24 = 48 => 100 - 48 = 52%

Question: 18 -

If the numerator of a fraction is increased by 20% and its denominator is diminished by 25% value of the fraction is 2/15. Find the original fraction. 

1/12

1/4

1/8

1/6

Answer:

1/12

Solution:

X * (120/100)
---------------- = 2/15
Y * (75/100)
X/Y = 1/12

Question: 19 -

The population of a town is 45000; 5/9th of them are males and the rest females 40% of the males are married. What is the percentage of married females? 

60%

40%

50%

45%

Answer:

50%

Solution:

Male = 45,000* 5/9 = 25,000
Female = 45,000* 4/9 = 20,000
Married Male = 25,000* 40/100 = 10,000
Married Female = 10,000
20,000 ------------ 10,000
100 ------------- ? => 50%

Question: 20 -

The amount of water (in ml) that should be added to reduce 9 ml. Lotion, containing 50% alcohol, to a lotion containing 30% alcohol, is? 

5

3

4

6

Answer:

6

Solution:

4.5          4.5
30%        70%
30% ----- 4.5
70% ------? => 10.5 - 4.5 = 6 ml