Wrong explanation scroll down
There are 6 children say Eddy, Freddy, Teddy, Kiddie, Luke and Ruth.
Now Ruth must come after luke so we can combine them into one unit (Luke+Ruth). Now the problem becomes arranging Eddy, Freddy, Teddy, Kiddie , Luke+Ruth (5 objects).
You can arrange 5 objects in 5! ways or 120.
I have already spoken to you about following the posting format. Write all the options in the question
Please follow the forum rules.http://greprepclub.com/forum/qq-how-to-post-a-gre-question-the-easy-way-2357.htmlhttp://greprepclub.com/forum/rules-for-posting-please-read-this-before-posting-1083.htmlPlease add tags to yur question ans specify the source of the same even if it is your coaching institution. We are open GRE resource for the students your questions should help other GRE aspirants as well.
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