Answer:
1/7
Explanation:
Probability is the likelihood or chance that an event will occur. this is expressed as;
Probability = Expected outcome/Total outcome
From the question, the total number of marbles is the total outcome
Total outcome = 5x + 2x + 3x + 4x
Total outcome = 14x
Since we are to find the probability of selecting a green marble, the expected outcome will be total number of green marbles which is 2x
Pr(selecting green marbles) = 2x/14x
Pr(selecting green marbles) = 1/7
Hence the probability of selecting a green marble is 1/7