Question

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

Options

• `3/11`

• `2/11`

• `4/11`

• `7/11`

Answer 1

A single letter is selected at random from the word 'PROBABILITY'. The probability that it is a vowel is `underlinebb(4/11`.

Explanation:

PROBABILITY

Vowels = O, A, I, I

Total cases = ¹¹C₁ = 11

Favourable cases = ⁴C₁ = 4

Required probability = `4/11`