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  1. A single letter is selected at random from the word 'PROBABILITY' . The probability that it is a vowel, is ?
    1. 3/11
    2. 4/11
    3. 2/11
    4. 0
Correct Option: B

Total number of letters = n(S) = 11
whereas, number of vowels = n(E) = 4
∴ Required probability = n(E)/n(s) = 4/11


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