Everyday Be Kind To A Stranger

Study the following information carefully and then answer the questions given below. A spying organisation receives messages from its spies via a computerised fax machine which generates different rearrangements of words to maintain secrecy of the transmitted messages. The following is an illustration of input and steps of rearrangement. Input: Anis goes to the bar after dinner everyday Step I: After Anis goes to the bar dinner everyday Step II. Anis after goes to the bar dinner everyday Step III: everyday Anis after goes to the bar dinner. Step IV: bar everyday Anis after goes to that Step V: dinner bar everyday Anis after goes , Step VI: goes dinner bar everyday Anis after And so on. What will be the seventh step of the rearrangement process?

In a singing competition a group of 10 pepole, participate, each person has exactly one friend and rest are strangers, the probability that both the singers of the duet are complete strangers is