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OpenStudy (anonymous):
WHOEVER GETS IT RIGHT/ANSWER WILL GET A MEDAL!!!!! A grid with 3 rows and 52 colums is tiled with 78 identical 2 X 1 dominoes. How many ways can this be done such that exactly two of the dominos are vertical??
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OpenStudy (theedwardsfamily):
the answer is 2 * 351 = 702
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