Question

There are 5 red marbles, 2 Green marbles and 3 black marbles. What is the probability that red or black is chosen?(answer in decimal form)

Answer 1

Red- 50% chance (.5)

Black- 30% Chance (.3)

Step-by-step explanation:

The total amount of marbles is ten, meaning that we can change it to 100% no problem.

Green - 2 = 20% = .2

Black - 3 = 30% = .3

Red - 5 = 50% = .5

Answer 2

.8

Step-by-step explanation:

5 red marbles, 2 Green marbles and 3 black marbles = 10 marbles

P (red or black) = number of red or black/ total

= (5+3)/10

=8/10

decimal form = .8