For Exercises 5–10, the observed frequencies are provided in a contingency table of two categorical variables. Find the expected frequencies, on the assumption that the variables are independent.
10.
| K1 | K2 | K3 | K4 | |
|---|---|---|---|---|
| L1 | 40 | 70 | 90 | 100 |
| L2 | 20 | 40 | 60 | 70 |
| L3 | 30 | 65 | 65 | 70 |