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Number of possible outcome = g+2
Total number of outcome = g+r+14+2 = g+r+16
So, probability of getting green marble is g+2/g+r+16 ie E
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Bunuel
A jar contains g green marbles and r red marbles. If 2 green and 14 red marbles are added, which of the following expresses the probability of then selecting a green marble at random?

A. g/r
B. (g+2)/(r+14)
C. (g+2)/(r+16)
D. (g+2)/(r+g+14)
E. (g+2)/(r+g+16)


Since the jar contains g green marbles and r red marbles, it contains a total of g + r marbles. Once 2 green and 14 red marbles are added, the jar then contains a total of g + r + 16 marbles, of which g + 2 are green marbles.

Thus, the probability of selecting a green marble is (g + 2)/(g + r + 16).

Answer: E
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Bunuel
A jar contains g green marbles and r red marbles. If 2 green and 14 red marbles are added, which of the following expresses the probability of then selecting a green marble at random?

A. g/r
B. (g+2)/(r+14)
C. (g+2)/(r+16)
D. (g+2)/(r+g+14)
E. (g+2)/(r+g+16)

Probability = Favourable Outcomes / Total Outcomes

Green Marbles = g
Red marbles = r
Total Marbles = g+r


New Number of Green Marbles = g+2
New Number of Red Marbles = r+14
New Number of Total Marbles = (g+2)+(r+14) = g+r+16


Probability of Selecting a Green Marble = Total Green Marble / Total Number of Marbles = (g+2)/(g+r+16)


Answer: option E
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the answer should be A
g+2/g+r+16 , probability of selecting green marbles
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