A restaurant surveyed 200 customers about their meal choice and whether they ordered dessert. The incomplete results are shown in the table below.
| Ordered Dessert | Did Not Order Dessert | Total | |
|---|---|---|---|
| Vegetarian Meal | 30 | 50 | 80 |
| Non-Vegetarian Meal | x | 70 | y |
If the probability that a randomly selected customer ordered dessert is 0.4, what is the value of x?
40
50
60
70
