First slide

Theorems of probability

Question

The probability that a vowel selected at random from an English book is 'u' is

Very Easy

A

$\frac{5}{26}$
B

$\frac{1}{5}$
C

$\frac{4}{5}$
D

$\frac{21}{26}$

Solution

$A E I O U \Rightarrow n (S) = 5_{c_{1}}$
$n (A) = n o . o f w a y s o f s e l e c t i n g' U'$

=1

$P (A) = \frac{1}{5}$

$∴ P (A) = \frac{1}{5}$

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