5. A hundred draws will be made at random with replacement from one of the following urns, each of which contain two numbered balls. Urn A contains a 1 and a 9. Urn B contains a 4 and a 6. The value of each draw will be recorded and the mean of the 100 draws calculated. Someone offers you a dollar if you can predict the value of the sample mean to within 0.1. Which urn offers you the best chance of winning the dollar