Question

A jar contains 30 red marbles, 50 blue marbles, and 20 white marbles. you choose one marble from the jar at random. what is the theoretical probability of choosing a white marble?

Answer 1

30+50+20=100 = altogether marbles
P(white)= 20/100 =1/5
P(white)=1/5

Answer 2

`|\Omega|=100\\ |A|=20\\ P(A)=(20)/(100)=(1)/(5)=20\%`