Question

A card is randomly selected from a standard 52-card deck of playing cards. determine the probability that the randomly selected card:
a. is red

Answer 1

Half (or 26) of the cards are red, and the rest are black.

P(randomly selected card is red) = 26/52 = 1/2.

Answer 2

$|\Omega|=52\\ |A|=26\\\\ P(A)=\dfrac{26}{52}=\dfrac{1}{2}=50\%$