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Answer : 4 240 Explanation : Answer: D) 240 Explanation: When R and W are the first and last letters of all the words then we can arrange them in 5!ways. Similarly When W and R are the first and last letters of the words then the remaining letters can be arrange in 5! ways.Thus the total number of permutations = 2 x 5!  = 2 x 120 = 240

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