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16 Feb 2017, 03:39
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
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Question Stats:
93% (00:47) correct
7%
(00:44)
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based on 141
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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)
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)
16 Feb 2017, 04:17
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probability of choosing some green marble: Total number of ending green marbles / total number of murbles
so ending green marble = g+2
total number = g +2 +r +14
so probability = (g+2) / (g +r +16)
answer is E
so ending green marble = g+2
total number = g +2 +r +14
so probability = (g+2) / (g +r +16)
answer is E
17 Feb 2017, 10:18
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Answer: [E]
Total choices = g +2 + r + 14
Favourable choices = g+ 2
Probability = (g+2) / (g +r +16)
Total choices = g +2 + r + 14
Favourable choices = g+ 2
Probability = (g+2) / (g +r +16)
