Question

A fair eight-sided die with the sides numbered 1 to 8 is rolled twice.

Answer 1

A - rolling an odd prime number followed by an even prime number

B - two numbers are consecutive numbers in ascending order

$|\Omega|=8^2=64\\\\ |A|=\underbrace{3}_{\text{3,5,7}}\cdot\underbrace{1}_{\text{2}}=3\\ |B|=\underbrace{7}_{\text{(1,2),(2,3),\ldots(7,8)}}\\\\\\ P(A)=\dfrac{3}{64}\approx5\%\\ P(B)=\dfrac{7}{64}\approx11\%$