During a certain week, a seal ate 50 percent of the first 80 : PS Archive
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# During a certain week, a seal ate 50 percent of the first 80

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CEO
Joined: 15 Aug 2003
Posts: 3460
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Kudos [?]: 864 [0], given: 781

During a certain week, a seal ate 50 percent of the first 80 [#permalink]

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13 Dec 2003, 04:56
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During a certain week, a seal ate 50 percent of the first 80 smelt it came across, and 30 percent of the remaining smelt it came across. If the seal ate 40 percent of the smelt it came across during the entire week, how many smelt did it eat?

32
40
55
64
80
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Joined: 12 Oct 2003
Posts: 247
Location: USA
Followers: 1

Kudos [?]: 6 [0], given: 0

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13 Dec 2003, 06:29
64

x --> total smelt
0.4(x) --> total smelt eaten

40 + 0.3(x-80) = 0.4(x)
16 = 0.1(x)
x = 160

0.4(x) = 64
13 Dec 2003, 06:29
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# During a certain week, a seal ate 50 percent of the first 80

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