Marsha has a bag that contains 4 green marbles, 8 yellow marbles, and 20 red marbles. If she chooses one marble from the bag, what is the probability that the marble is not red?

Question

robtobey2 · Answer

1-(20/32)

mariamikayla · Answer

probability=number of favorable cases/number of possible cases

the number of favorable cases is obtain by adding the number of green marbles with the number of yellow marbles

number of favorable cases : 4+8=12

number of possible casses is the sum of all marbles: 4+8+20=32

probability=12/32= 3/8