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# For every X, the action is defined: is the greatest

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SVP
Joined: 05 Apr 2005
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For every X, the action is defined: is the greatest [#permalink]

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14 Aug 2005, 20:47
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For every X, the action [X] is defined: [X] is the greatest integer less than or equal to X. What is the value of [6.5] x [2/3] + [2] x 7.2 + [8.4] â€“ 6.6?

(a) 12.6.
(b) 14.4.
(c) 15.8.
(d) 16.2.
(e) 16.4.
Manager
Joined: 14 Jul 2005
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15 Aug 2005, 00:35
[X] is the greatest integer less than or equal to X

[6.5] x [2/3] + [2] x 7.2 + [8.4] â€“ 6.6 =
6*0 + 2*7.2 + 8 - 6.6 =
14.4 + 8 - 6.6 =

15.8 => the answer is (C)
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