my son wants a certain kind of football and the store carrys f4 brand names but my son did not tell me the name what is my chance of picking the correct one the brands names are w,x,y, and z

 . Christmas is coming and your son lets it be known that he wants a football made from a certain brand name that he does not disclose to you. You know from doing research on the web that there are four different brand names of football, brands W, X, Y, and Z that are sold at the only sporting goods store in town. What is the probability you buy the football made by your son’s brand of choice and therefore save Christmas?