Answer
36/275
Work Step by Step
As seen from the table, there are 72 left-handed people and 478 right-handed people. You then add these two numbers together to get the total number of the left and right-handed people. Then, since the question asked for the relative frequency of sophomores, it will be (478 + 72 = 550) 72/550. If you simplify that, it will be 36/275.