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Amount Earned/Day $96 $84 $80 $70 $48

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Intern
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Joined: 12 Dec 2005
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Amount Earned/Day $96 $84 $80 $70 $48  [#permalink] New post 13 Apr 2006, 15:12
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A
B
C
D
E

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Amount Earned/Day $96 $84 $80 $70 $48
No of days 4 7 4 3 2

A Student worked for 20 days. For each of the amounts shown in the first two rows of the table, the second row gives the no of days that the student earned that amount. What is the median amount of money that the student earned per day for the 20 days.

a. $96
b. $84
c. $80
d. $70
e. $48

Can you please help solve this problem for me. Appreciate an explanation of the solution.
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Joined: 09 Feb 2006
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 [#permalink] New post 13 Apr 2006, 15:25
The median is the "middle" number in a set. If the set of numbers is even, then it is the average of the two middle numbers.

Easiest surest way to solve this is honestly to just quickly write out the set:

96,96,96,96,84,84,84,84,84,84,84,80,80,80,80,70,70,70,48,48

The two middle numbers are 84 and 84. Therefore, the answer is B.

There may be an easier way, but this took less than a minute as long as you understand the concept.
  [#permalink] 13 Apr 2006, 15:25
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Amount Earned/Day $96 $84 $80 $70 $48

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