Question

Given a set of number S = (2,4,7,10,13,16,22,27,81,102). If a number is picked at random, find the probability that the number is even or prime.

Answer 1

Total outcomes $n(S) =10.$

Favorable outcomes :

$A=\begin{Bmatrix} 2,4,7,10,13,16,22,102 \end{Bmatrix},\\ n(A)=8,\\ P(A)=\cfrac{8} {10 }.$