Question

X 0-10 10-20 20-30 30-40 40-50 50-60 60-70 Y 4 9 13 15 12 8 3

Answer 1

Answer: 8.89

Explanation:stigma (x) is 245

Stigma(xy) is 2180

And when you divide 2180 from 245 u will get 8.89 or9