Mrs. Jordan surveyed all of her students to find out which testing format they prefer. Of the 120 students, 30 prefer ALEKS. com, 60 prefer paper, 10 prefer Deltamath. com and 20 prefer Microsoft Forms. What is the frequency of students who prefer taking their test online?
30

10

60

20

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.