Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. For a charity event, raffle tickets are printed such that they have a vowel (excluding y) as the first character and a prime number less than 10 as the second digit. (Note that 1 is not a prime number.)

The probability that the winning ticket has the vowel contained in the word event and the digit is the number of letters in the word event is

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