'' is Tachanka ' s helmet . the ' 7 ' is him saluting his followers . <| sep |> Happens to me a lot as well . I have an Xperia Z 5 , maybe it ' s something with the phone ? I ' ve had to forget the connection with the phone using the watch and reconnect . Really annoying ! <| sep |> She did this like Bush did 911 . <| sep |> It ' s like we ' re in the house , eerie <| sep |> And a rule warper with money feats . <| sep |> How can they pay with food stamps for a prepared beverage ? <| sep |> Agreed . Your offense is not built to score in 30 seconds . <| sep |> Ohhh of course ! You are assuming the memorylessness of table unavailability . That ' s actually a very reasonable assumption . It somehow didn ' t occur to me in recreational math mindset , but it would have automatically assumed if was presented in queueing theory context . This property uniquely determines the table unavailability time as having exponential distribution with lambda 175 . Since we are waiting for 10 tables , the combined wait time distribution is simply another exponential distribution with lambda 1075 . The mean of this distribution is 1 lambda 7510 , so the answer is 7510 minutes . Your mistake is indeed at the very end when you compute the median of the distribution instead of the mean .