The defintion of sucess is to select the red ball. There are 8 red balls and 2 yellow balls in first container and 5 red balls and 5 yellow balls  in second container. The ball will be selected from the first container first. If red ball is selected second trial will not be made. If not second trial will be done from second container. In such case what is the probability of sucess?

Do you guys have any guess to the analogy of this probability question??