1 . 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 ?

• A. 2/7
• B. 510
• C. 5/9
• D. 2/9
• D. None of them

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Answer: Option C

Explanation: