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A single letter is selected at random from the word 'PROBABILITY' . The probability that it is a vowel, is?

3/11
4/11
2/11
0

Correct Answer: 4/11

Explanation:

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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