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Ierofanga [76]
3 years ago
14

The letters of the word mississippi are placed in a hat. what is the probability that the first two letters drawn are both i if

the first letter drawn is not replaced?
Mathematics
1 answer:
allochka39001 [22]3 years ago
3 0
For the first letter drawn, there are no conditions/restrictions we need to consider. So, the number of ways to draw an i is:
\text{Draw(i): } \frac{4}{11}

For the second draw, the i is not replaced. That means, we've shrunk the sample space because we're dealing with less elements for the second draw. Firstly, one i disappears since we picked an "i" and there are 10 elements left, not 11.

Thus, to draw the second i, we have:
\text{Draw(ii): } \frac{3}{10}

\text{P(drawing 2 i's): } \frac{4}{11} \cdot \frac{3}{10} = \frac{12}{110} = \frac{6}{55}
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