The ratio of the number of red balls, to yellow balls, to green balls in an urn is 2:3:4. What is the probability that a ball chosen at random from the urn is a red ball?
Answer:
2/9
The ratio of the number of red balls, to yellow balls, to green balls in an urn is 2:3:4. What is the probability that a ball chosen at random from the urn is a red ball?