SOLUTION: How many numbers of four different digits can be formed from the digits 1,2,3,4,5,6,7,8, and 9 if each number must consist of two odd and two even digits?
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Question 1157462: How many numbers of four different digits can be formed from the digits 1,2,3,4,5,6,7,8, and 9 if each number must consist of two odd and two even digits? Answer by greenestamps(13203) (Show Source):
