A mechanical aptitude test was submitted to 2 groups of workers. The first group (group A) scored 70 with a standard deviation of 8 while the second group (group B) scored 71.5 with a standard deviation of 10. It is assumed that the results obtained in this test are distributed according to the normal model. Two workers are chosen at random, one worker from group A and another from group B. The odds out of 100 that the test result of the worker from group A will be lower than that of the worker from group B are