Question

What is the probability of rolling an odd number on a fair 6-sided number cube?

Answer 1

$\Omega=\{1;\ 2;\ 3;\ 4;\ 5;\ 6\}-all\ results\\|\Omega|=6\\\\A=\{1;\ 3;\ 5\}-odd\ numbers\\|A|=3\\\\P(A)=\dfrac{|A|}{|\Omega|}\to P(A)=\dfrac{3}{6}=\dfrac{1}{2}=0.5$

Answer: 0.5