calculating basic probability

Question

Given a bag with 20 marbles, if 6 are red and 9 are blue and 5 are green. What is the probability of picking a green marble on your first try? (Write the probability as a percentage)

Answer 1

5/20 = 1/4 = 25% chance of a green

on 1st draw out of 20 where 5 are green

Answer 2

Hi,

The number of outcomes is 20 and the number of favorable event is green marble = 5

P( appear green ) = 5/20 = 1/4 25%

I hope it is useful.

Minoo