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Monday, March 4, 2013

Civil Service Commission Professional or Sub-Professional Reviewer - Page 97/159

Mathematics Test IV Solution - Page 97

19. This year XYZ company's profit was $ 2, 440, 000, which is 22% more than last year's profit. How much was the profit last year ?

Let x - be the year's profit

x + 0.22x = $ 2, 440, 000

1.22x = $ 2, 440, 000

x =  $ 2, 440, 000 
             1.22

x = $ 2, 000, 000 * Ans

20. Mrs. Ramos pays $ 1, 530 for a dress at 15 % discount. How much is the marked price ?

Let x - be the marked price

Marked price - Discount = Selling price

x - 0.15 x = $ 1530

0.85x = $ 1530

x =  $ 1540 
         0.85

x = $ 1, 800 * Ans.

21. A customer buys 4 pairs of socks originally priced at $ 60.00 each. If the reduced price is $ 47.50, how much does he save on this purchase ?

Amount saved = 4 x ( $ 60.00 - $ 47.50)
                      = 4 x $ 12.50
                      = $ 50.00 * Ans.

22. Gerard left City A to drive to City B at 6:15 A.M. and arrived at 1:45 P.M. If he averaged 60 km per hour and stopped one hour for lunch, how far is City A to City B ?

No. of hours :

6 : 15 to 11:45

1:45 PM - 6:15 PM

13:45 PM - 6:15 PM = 7:30 or 7 and 1/2 hours total time

total time traveled = 7 ½ hours - 1 hour (time spent for lunch) = 6 ½ hours.

distance = rate x time

60 =  km  x 6 ½ hours
          hr

= (60 x 6 ½ ) km

= [60 x 6 + 60 ½ ] km

= 360 + 30

= 390 km * Ans.

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