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Of the marbles in a jar, 14 are green. Joseph randomly takes
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04 Nov 2020, 11:07
04 Nov 2020, 11:07
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Of the marbles in a jar, 14 are green. Joseph randomly takes one marble out of the jar. If the probability is \(\frac{7}{8 }\) that the marble he chooses is green, how many marbles are in the jar?
Source: 320 GRE Math Questions
Show: :: OA
16
Source: 320 GRE Math Questions
Re: Of the marbles in a jar, 14 are green. Joseph randomly takes
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06 Nov 2020, 06:42
06 Nov 2020, 06:42
1
Let 'x' be the total number of marbles in the jar (i.e. green marbles + other colored marbles)
There are 14 green marbles.
Therefore, probability of selecting a green marble = 14/x
Therefore, 14/x = 7/8
x = 16
There are 14 green marbles.
Therefore, probability of selecting a green marble = 14/x
Therefore, 14/x = 7/8
x = 16
gmatclubot
Re: Of the marbles in a jar, 14 are green. Joseph randomly takes [#permalink]
06 Nov 2020, 06:42
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