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How many marbles does Kevin have? (1) If Kevin had 10 fewer marbles

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Math Expert
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Joined: 02 Sep 2009
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How many marbles does Kevin have? (1) If Kevin had 10 fewer marbles  [#permalink]

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New post 29 Oct 2018, 04:57
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

91% (00:44) correct 9% (01:13) wrong based on 24 sessions

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Joined: 18 Jul 2018
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Concentration: Finance, Marketing
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Re: How many marbles does Kevin have? (1) If Kevin had 10 fewer marbles  [#permalink]

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New post 29 Oct 2018, 05:14
From statement 1:

Let Kevin have X marbles.
Then X-10 = X/2
Solving gives X = 20.
Sufficient.

From statement 2:

Total Marbles = White+3Black.
Clearly insufficient.

A is the answer.
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Re: How many marbles does Kevin have? (1) If Kevin had 10 fewer marbles   [#permalink] 29 Oct 2018, 05:14
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How many marbles does Kevin have? (1) If Kevin had 10 fewer marbles

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