Probability Even Odd
1. **Problem statement:** Mia writes down five whole numbers and picks one at random. Outcome E is picking an even number, and outcome O is picking an odd number. We need to determine for two statements whether they must be true, could be true, or must be false.
2. **Understanding the problem:** Mia has 5 whole numbers. Each number is either even or odd. Outcome E is the event of picking an even number, and outcome O is picking an odd number.
3. **Statement 1: "Outcome E is more likely to happen than outcome O"**
- This means the number of even numbers is greater than the number of odd numbers.
- Since Mia chooses 5 numbers, possible distributions of even and odd numbers are:
- 5 even, 0 odd
- 4 even, 1 odd
- 3 even, 2 odd
- 2 even, 3 odd
- 1 even, 4 odd
- 0 even, 5 odd
- Outcome E is more likely than O only if even numbers > odd numbers, i.e., 3, 4, or 5 even numbers.
- But Mia could have any combination, so this statement:
- **Could be true** (if more evens)
- **Could be false** (if more odds)
- It **does not have to be true** always
4. **Statement 2: "Outcome E and outcome O can happen at the same time"**
- This means it is possible to pick a number that is both even and odd simultaneously.
- Since a number cannot be both even and odd at the same time, this is impossible.
- However, the question might mean if both outcomes can occur in the sample space (i.e., the set of numbers contains both even and odd numbers).
- If Mia's 5 numbers include at least one even and one odd number, then both outcomes can happen (depending on which number is picked).
- So:
- It **could be true** if the list contains both even and odd numbers.
- It **must be false** if all numbers are only even or only odd.
- Therefore, the statement "Outcome E and outcome O can happen at the same time" is:
- **Could be true**
**Final answers:**
- Outcome E is more likely than outcome O: Could be true [✓]
- Outcome E and outcome O can happen at the same time: Could be true [✓]