Question

A jar contains 30 red marbles 50 blue marbles and 20 white marbles what is the the theoretical probability of choosing a white marble

Answer 1

`(white\ marbles)/(all\ marbles)= (20)/(20+3+50) = (20)/(100) =\boxed{ (1)/(5) } \\ \\ \\ \\ \\`

Answer 2

theoretical probablity=desiredoutcomes/totalpossibleoutcomes

desired=number of white marbles=20
total possible=red+blue+white=30+50+20=100

so theoretical probablity=20/100=2/10=0.2=20%