Answer:To calculate the probability that the first three letters chosen by Alexis from the word "DINOSAUR" are vowels, we first need to determine the total number of possible outcomes and the number of favorable outcomes.
Total number of outcomes:
The word "DINOSAUR" has a total of 8 letters.
Number of favorable outcomes:
Out of the 8 letters, there are 3 vowels (I, O, U).
To calculate the probability, we divide the number of favorable outcomes by the total number of outcomes:
Probability = Number of favorable outcomes / Total number of outcomes
Probability = 3 / 8
Simplifying, we find that the probability is:
Probability = 3/8
Therefore, the probability that the first three letters chosen by Alexis are vowels from the word "DINOSAUR" is 3/8.
Explanation: