A group of 8 cups need to be arranged. There are 2 blue cups and 2 red cups and the two of the pair of cups must be kept togather. in how many arrangements can the cups be arranged?
Choices: A) A.1296 B) B.1850 C) C.2880 D) D.3546 E) E.4200
Glue cupstogether: {AB}, {CD}.   6 units {AB}, {CD}, {E}, {F}, {G}, {H} can be arranged in 6! ways. Each cups within their unit can be arranged in 2! ways.   Therefore the final answer is 6!*2!*2!=2,880.   Answer: C.2880.
<result>C</result>
A group of 8 cups need to be arranged. There are 2 blue cups and 2 red cups and the two of the pair of cups must be kept togather. in how many arrangements can the cups be arranged?