3 The table below shows the number of athletes who stretch before exercising and how many had injuries within the past year Stretches Does not stretch Total Find a P Stretches Injury in last year 55 231 286 b P Stretches and had no injury last year c P Stretches or had no injury last year d P Stretches had no injury last year No injury in last year 295 219 514 Total 350 450 800