1. **State the problem:**
We have a game with three possible winnings: €0, €10, and €12. The angles for the corresponding sectors in the pie chart are 90°, 60°, and an unknown angle for €12. We need to complete the table with the missing angle and probabilities, then find the probability that Laura ends up neither winning nor losing money after playing twice.
2. **Find the missing angle:**
The total angle in a circle is 360°.
$$\text{Angle for } €12 = 360° - 90° - 60° = 210°$$
3. **Calculate probabilities:**
Probability is proportional to the angle divided by 360°.
- For €0: $$P(0) = \frac{90°}{360°} = \frac{1}{4}$$ (given)
- For €10: $$P(10) = \frac{60°}{360°} = \frac{1}{6}$$
- For €12: $$P(12) = \frac{210°}{360°} = \frac{7}{12}$$
4. **Check probabilities sum:**
$$\frac{1}{4} + \frac{1}{6} + \frac{7}{12} = \frac{3}{12} + \frac{2}{12} + \frac{7}{12} = \frac{12}{12} = 1$$
5. **Find probability Laura neither wins nor loses money after two plays:**
This means total winnings = €0 after two plays.
Possible ways:
- Win €0 both times.
Probability:
$$P(0,0) = P(0) \times P(0) = \left(\frac{1}{4}\right)^2 = \frac{1}{16}$$
6. **Final answers:**
- Missing angle for €12: 210°
- Probability for €10: $\frac{1}{6}$
- Probability for €12: $\frac{7}{12}$
- Probability Laura neither wins nor loses money after two plays: $\frac{1}{16}$
Probability Angles 9143Fd
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