This notion that the military should allow females into the combat arms is all well and good , but I cannot support it if there is any evidence that it will get other people killed . Yeah , if someone just doesn ' t fulfill the requirements for a certain job , they shouldn ' t be in that certain job . Especially when people ' s lives are on the line . A soldier would have to carry a wounded soldier back to base , and if the soldier is too weak for that , then it ' s going to cost lives . Gender doesn ' t matter . <| sep |> Wow ! ! We would love for you to join us <| sep |> First , we can split the sum . Then , we can evaluate each one . sum xi xbarn sum xin sum xbarnsum xin x 1 x 2 . xnn xbarsum xbarn nxbarn xbarSo , the sum is equal toxbar xbar 0