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25 Apr 2017, 06:56
1
00:00

Difficulty:

25% (medium)

Question Stats:

83% (01:17) correct 17% (01:17) wrong based on 27 sessions

### HideShow timer Statistics

A fishing boat receives $1.50 for each tuna it brings back to port and$1.70 for each mackerel. How many mackerels did it bring back to port yesterday?

(1) Yesterday the number of tuna that the boat brought back was 5 less than twice the number of mackerel brought back.

(2) Yesterday the boat received a total of $2,930 from tuna and mackerel brought back. Source: GMAT Free _________________ Senior CR Moderator Status: Long way to go! Joined: 10 Oct 2016 Posts: 1373 Location: Viet Nam Re: A fishing boat receives$1.50 for each tuna it brings back to port and  [#permalink]

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04 May 2017, 01:39
nguyendinhtuong wrote:
A fishing boat receives $1.50 for each tuna it brings back to port and$1.70 for each mackerel. How many mackerels did it bring back to port yesterday?

(1) Yesterday the number of tuna that the boat brought back was 5 less than twice the number of mackerel brought back.

(2) Yesterday the boat received a total of $2,930 from tuna and mackerel brought back. Source: GMAT Free Call $$x,y$$ are respectively the number of tuna and the number of mackerel. (1) We have $$x=2y-5$$. However, we cannot know the value of $$x$$ and $$y$$. Insufficient. (2) We have $$1.5x+1.7y=2930$$. We still dont know the value of them. Insufficient. Combine (1) and (2) we have $$\Big \{ \begin{array}{lr} x-2y =-5 \\ 1.5x+1.7y =2930 \end{array} \implies \Big \{ \begin{array}{lr} x = 625\\ y =1245 \end{array}$$ Sufficient. The answer is C _________________ Re: A fishing boat receives$1.50 for each tuna it brings back to port and &nbs [#permalink] 04 May 2017, 01:39
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