To calculate the probability that a random letter is not a vowel, we first sum up the probabilities of all vowels provided in the table and then subtract that sum from 100%.

Step 1: Sum up the probabilities of vowels

• Probability of A: $15\%$
• Probability of E: $22\%$
• Probability of I: $11\%$
• Probability of O: $6\%$
• Probability of U: $2\%$

$\text{Total probability of vowels} = 15 + 22 + 11 + 6 + 2 = 56\%$

Step 2: Calculate the probability of not a vowel

The probability of not being a vowel is the complement of being a vowel:

$\text{Probability of not a vowel} = 100\% - 56\% = 44\%$

Final Answer:

The probability that a random letter is not a vowel is 44%.

Let me know if you need further clarification!

Here are 5 related questions for further practice:

1. What is the probability of randomly selecting a letter that is either A or E?
2. If the probabilities represent a single page, what is the chance of randomly picking a consonant on two consecutive pages?
3. How would the total probability change if the probability of E was reduced to 20%?
4. If the probabilities are based on a book with 10,000 letters, how many are expected to be vowels?
5. How do these probabilities relate to general frequency distributions of vowels in English text?

Tip: When working with probabilities, always ensure that the total probabilities sum to 100% to verify the accuracy of your data!