Answer:

Step-by-step explanation:
Let
- D be the event that the card drawn is a black card
- F be the event that the card drawn is a 10 card
- F' be the event that the card drawn is not a 10 card
The probability

Note that

So,

Answer:
It is 0.
Step-by-step explanation:
The question is asking you what number represents sea level, not how higher the plane is from the airport. Sea level is represented by 0.