Question

A Single letter is selected at random from the word 'PROBABILITY'. The probability that it is a vowel, is
(a) $\frac{1}{3}$

(b) $\frac{4}{11}$

(c) $\frac{2}{11}$

(d) $\frac{3}{11}$

Answer 1

In the word PROBABILITY
Total number of letters = 11
Number of vowels = 4
$\begin{array}{rcl}\therefore \mathrm{Probability}\mathrm{of}\mathrm{getting}\mathrm{a}\mathrm{vowel}& =& \frac{\mathrm{number}\mathrm{of}\mathrm{vowles}}{\mathrm{total}\mathrm{number}\mathrm{of}\mathrm{letters}}\\ & =& \frac{4}{11}\end{array}$

Hence, the correct answer is option B.