Question

A box is filled with 7 red cards, 4 brown cards, and 3 yellow cards. A card is chosen at random from the box. What is the probability that it is a red or a yellow card? Write your answer as a fraction in simplest form.

Answer 1

A - choosing a red or a yellow card

$|\Omega|=14\\ |A|=10\\\\ P(A)=\dfrac{10}{14}=\dfrac{5}{7}\approx71\%$