The ratio of the number of the 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 red ball ?

A \(\frac{2}{7}\)

B \(\frac{5}{{10}}\)

C \(\frac{5}{9}\)

D \(\frac{2}{9}\)

Correct Answer: Option D

Total results = 2+3+4 = 9, Favorable results is = 2 Probability is = \(\frac{2}{9}\)