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Mathematical Skills | Percentage

Q. No. 19:A worker earns a 5% raise. A year later, the workers receives a 2.5% cut in pay, and now his salary is Rs 22702.68. What was his salary to begin with?
A :
Rs 22000
B :
Rs 22176
C :
Rs 25000
D :
Rs 22193
Q. No. 20:Village X has a population of 6800, which is decreasing at the rate of 120 per year. Village Y has a population of 4200, which is increasing at the rate of 80 per year. In how many years will the population of the two village be equal?
A :
9
B :
11
C :
13
D :
16
Q. No. 21:A video magazine distributor made 3500 copies of the march issue of the magazine at a cost of Rs 3,50,000. He gave 500 cassettes free to some key video libraries. He also allowed a 25% discount on the marked price of the cassette and gave one extra cassette free with every 29 cassettes bought at a time. In this manner, he was able to sell all the 3500 cassettes that were produced. If the market price of the cassette was Rs 150, then what is the gain or loss % for the march issue of video magazine? 
A :
25% loss
B :
10% gain
C :
40% gain
D :
6.8% loss
Q. No. 22:Ravi's salary is 150% of Amit's salary. Amit's salary is 80% of Ram's salary. What is the ratio of Ram's salary to Ravi's salary?
A :
1:2
B :
2:3
C :
5:6
D :
6:5
Q. No. 23:Peter got 30% of the maximum marks in an examination and failed by 10 marks. However, Paul who took the examination got 40% of the total marks and got 15 more than the passing marks in the examination. What were the passing marks in the examination?
A :
35
B :
250
C :
75
D :
85
Q. No. 24:The length of the rectangular plot is increased by 25% to keep its area unchanged, the width of the plot should be
A :
Reduced by 20%
B :
Increased by 20%
C :
Increased by 25%
D :
Reduced by 25%
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