Question

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

Answer 1

1. Red=2 yellow=3 green=4
2. Sum=2+3+4=9
3. P=o(A)/o(S)
4. 2/9=2.2222...
5. 0.2222*100=22%