Tell whether the following is certain to happen, impossible, can happen but not certain
A tossed coin will land heads up

Answer

To determine whether the statement "A tossed coin will land heads up" is certain to happen, impossible, or can happen but not certain, we can analyze the situation step by step.

### Step-by-Step Solution:

1. **Understanding the Coin Toss**:
- A standard coin has two sides: heads and tails. When you toss a coin, it can land on either side.

**Hint**: Remember that a fair coin has two possible outcomes.

2. **Identifying the Outcomes**:
- The possible outcomes when tossing a coin are:
- Heads
- Tails
- Each outcome has an equal chance of occurring.

**Hint**: Think about the probability of each outcome when a coin is tossed.

3. **Analyzing the Probability**:
- The probability of landing heads up is 1 out of 2 (or 50%).
- Similarly, the probability of landing tails up is also 1 out of 2 (or 50%).

**Hint**: Probability can be expressed as a fraction of favorable outcomes over total outcomes.

4. **Determining the Nature of the Event**:
- The statement "A tossed coin will land heads up" is not certain because it can also land tails up.
- It is not impossible either, as heads can indeed come up when the coin is tossed.

**Hint**: Consider the definitions:
- Certain to happen: 100% chance
- Impossible: 0% chance
- Can happen but not certain: Between 0% and 100% chance

5. **Conclusion**:
- Since there is a 50% chance of the coin landing heads up, we conclude that it "can happen but is not certain."

**Hint**: Reflect on the meaning of "can happen but not certain" in relation to the probabilities.

### Final Answer:
The statement "A tossed coin will land heads up" can happen but is not certain.