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# If cube A has some blue and some red faces, what percent of the total

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Math Expert
Joined: 02 Sep 2009
Posts: 55277
If cube A has some blue and some red faces, what percent of the total  [#permalink]

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11 Sep 2018, 03:03
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Difficulty:

55% (hard)

Question Stats:

53% (01:10) correct 47% (00:50) wrong based on 18 sessions

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If cube A has some blue and some red faces, what percent of the total surface area of cube A is blue?

(1) More than 3 faces are red.
(2) More than 4 faces are red.

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Math Expert
Joined: 02 Aug 2009
Posts: 7688
Re: If cube A has some blue and some red faces, what percent of the total  [#permalink]

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11 Sep 2018, 05:15
If cube A has some blue and some red faces, what percent of the total surface area of cube A is blue?

Total faces of a cube = 6. some red and some blue means there is atleast one face of each

(1) More than 3 faces are red.
so red is 4 or 5 and accordingly blue would be 1 or 2
insuff

(2) More than 4 faces are red.
only possibility is that red is 5 and then blue is 1
fraction is 1/6
red cannot be 6 as then all faces would be red and the restriction of some face blue is not followed
Suff

B
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Re: If cube A has some blue and some red faces, what percent of the total   [#permalink] 11 Sep 2018, 05:15
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