Number of Females (F) | Number of Males (M) | |
Students who prefer chicken for lunch (C) | 15 | 10 |
Students who prefer reef fish for lunch (R) | 20 | 15 |
Students who prefer pork stew for lunch (S) | 10 | 15 |
Students who prefer hamburger and french fries for lunch (H) | 5 | 10 |