1. **Problem 13:** Find the probability of drawing the letter p or the letter i from the letters of "Mississippi".
2. The word "Mississippi" has 11 letters: M(1), I(4), S(4), P(2).
3. Since the event is drawing a letter p or a letter i, these are mutually exclusive events (you cannot draw both at once), so we **add** the probabilities.
4. Probability of drawing p is $\frac{2}{11}$ and probability of drawing i is $\frac{4}{11}$.
5. So, the combined probability is:
$$\frac{2}{11} + \frac{4}{11} = \frac{6}{11}$$
6. The fraction $\frac{6}{11}$ is already in simplest form.
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1. **Problem 17:** Find the probability of drawing the letter i, not replacing it, and then drawing another i.
2. This is a compound event with dependent probabilities because the first letter is not replaced.
3. Probability of first drawing an i is $\frac{4}{11}$.
4. After drawing one i, there are now 3 i's left and total letters left are 10.
5. Probability of drawing another i is $\frac{3}{10}$.
6. Multiply the probabilities because both events must happen:
$$\frac{4}{11} \times \frac{3}{10} = \frac{12}{110}$$
7. Simplify the fraction by dividing numerator and denominator by 2:
$$\frac{\cancel{12}^{6}}{\cancel{110}^{55}} = \frac{6}{55}$$
**Final answers:**
- Problem 13: $\frac{6}{11}$ (add probabilities)
- Problem 17: $\frac{6}{55}$ (multiply dependent probabilities)
Probability Mississippi 580171
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