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QOTD#28 On a fishing trip, Robert caught salmon and halibut

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GMAT Club Legend
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QOTD#28 On a fishing trip, Robert caught salmon and halibut [#permalink] New post 14 May 2017, 05:15
Expert's post
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Question Stats:

88% (00:16) correct 11% (00:00) wrong based on 9 sessions
On a fishing trip, Robert caught salmon and halibut in a ratio of 4:5. If Robert caught 12 salmon, how many total fish did he catch?



Drill 1
Question: 13
Page: 337/338


[Reveal] Spoiler: OA
27

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Re: QOTD#28 On a fishing trip, Robert caught salmon and halibut [#permalink] New post 22 May 2017, 15:10
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Expert's post
sandy wrote:
On a fishing trip, Robert caught salmon and halibut in a ratio of 4:5. If Robert caught 12 salmon, how many total fish did he catch?



Drill 1
Question: 13
Page: 337/338


[Reveal] Spoiler: OA
27


Let's use equivalent ratios in the form salmon/halibut

Robert caught salmon and halibut in a ratio of 4:5
So, the ratio is 4/5

Robert caught 12 salmon
Let H = # of halibut caught
So, the ratio is 12/H

So, we can write: 4/5 = 12/H
Cross multiply to get: 4H = (5)(12)
Simplify: 4H = 60
Solve: H = 15

So, Robert caught 12 salmon and 15 halibut

TOTAL number of fish caught = 12 + 15 = 27

Answer:
[Reveal] Spoiler:
27


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GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jun 2014
Posts: 4750
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 93

Kudos [?]: 1662 [0], given: 396

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Re: QOTD#28 On a fishing trip, Robert caught salmon and halibut [#permalink] New post 04 Jun 2017, 15:04
Expert's post
Explanation

Make a ratio box and fill in what you know: the ratio and the total number of salmon.

You then total number of fish in the ratio row, and find your multiplier in the salmon column.

Multiply down to figure out the actual total number of fish, which is 27.

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[Reveal] Spoiler: Img
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Re: QOTD#28 On a fishing trip, Robert caught salmon and halibut   [#permalink] 04 Jun 2017, 15:04
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QOTD#28 On a fishing trip, Robert caught salmon and halibut

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