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September 20, 2014

September 20, 2014

Posted by **leslie** on Wednesday, July 8, 2009 at 8:00pm.

so confused please help

- math -
**MathMate**, Wednesday, July 8, 2009 at 8:16pmIt will not be complicated if we write down the information mathematically.

Let the initial of each person represent the distance in metres ahead of the last athelete.

Then according to the question:

A-I = 7

U-B = 12

A-L = 5

U-A = 3

Disregard Cathy for the moment.

We can tell that Ursula is ahead of everyone, and Alma is second, since there is only ursula ahead of her. Since A-L=5 and A-I=7, we conclude that Lani is ahead of Isabel.

The order is thus, after applying the distances

U=12

A=9

L=4

I=2

B=0

Now we can insert Cathy being (U+B)/2=6, between Alma and Lani.

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