A grade school boy has six blue and five white marbles in his left pocket and five blue and six white marbles in his right pocket. If he transfers one marble at random from his left to his right...

A grade school boy has six blue and five white marbles in his left pocket and five blue and six white marbles in his right pocket. If he transfers one marble at random from his left to his right pocket, what is the probability of his then drawing a blue marble from his right pocket?  (Without calculation process and interpretation, no credit)