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# Interpretation of Table

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Director
Status: No dream is too large, no dreamer is too small
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15 Feb 2011, 12:20
00:00

Difficulty:

25% (medium)

Question Stats:

86% (01:32) correct 14% (00:23) wrong based on 14 sessions

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City A City B City C City D City E City F
City A
City B
City C
City D
City E
City F
Attachment:
table.docx [10.7 KiB]

In the table above, what is the least number of table entries that are needed to show the mileage between each city and each of the other five cities?
15
21
25
30
36
[Reveal] Spoiler: OA

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Director
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Kudos [?]: 222 [1] , given: 78

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15 Feb 2011, 12:24
1
KUDOS
Look at this question as a Combination question

If you want to show the mileage between two cities, you have to select 2 out of the 6 cities given.
the total number of selections would be 6C2 = 15

Total number of Entries = 15
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Manager
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Kudos [?]: 34 [1] , given: 0

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15 Feb 2011, 21:32
1
KUDOS
Other than using combinations, you could see the chart has 6*6 = 36 entries. Diagonal is the distance from A to A, B to B etc so we can remove 6, leaving 30. Each has a duplicate so divide by 2 = 15
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19 Apr 2011, 19:50
I did this one by counting rows in starting from each column, and decreasin succesively by 1. So A has 5 entries, B has 4 and so on..

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Joined: 19 Apr 2011
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Kudos [?]: 1 [0], given: 1

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19 Apr 2011, 20:16
Easy way to go about this problem is we have 6*6 = 36 enteries in table the least number of enteries would be (36 - 6) /2 since 6 enteries represent the distances between same points .

Alternatively this can be solved as combination problem.

Re: Interpretation of Table   [#permalink] 19 Apr 2011, 20:16
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