Question

box contains balls from 1 to 25. A ball is selected at random, find the probability that the

ball is :
(i) Multiple of 5. (ii) Prime number​

Answer 1

$\huge\mathbb\color{teal}ANSWER:-$

$Total \: balls = 25$

$1,2,3,4,5,...........,25$

$\small\boxed{probability=\frac{Favourable \: result}{Total \: result}}$

$(i) multiple \: of \: 5 = 5,10,15,20,25$

$Favourable \: results=5$

$Total \: results = 25$

$probability =\frac{5}{25} =\frac{1}{5}$

$(ii) prime \: numbers-$

$2,3,5,7,11,13,17,19,23$

$Favourable \: results = 9$

$Total \: results = 25$

$probability =\frac{9}{25}$