In how many categories did the total number of items...

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BTGmoderatorLU: Moderator; Posts: 2544; Joined: Sun Oct 15, 2017 1:50 pmFollowed by: 6 members

by BTGmoderatorLU » Sat Oct 28, 2017 6:02 pm

In how many categories did the total number of items (import and export) exceed 75 million?

(A) 1
(B) 2
(C) 3
(D) 4
(E) none

The OA is B.

I need help with this PS question. Can any expert assist me with it, please? Thanks.

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Source: Beat The GMAT — Problem Solving | Sat Oct 28, 2017 6:02 pm

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by [email protected] » Sun Oct 29, 2017 9:44 am

Hi LUANDATO,

In this question, we're looking for the categories in which the TOTAL imports and exports are at least $75 million. The math involved is really just arithmetic, but we have to make sure that we keep careful track of each category. There is a minor 'shortcut' in this question though - between the two pie charts, there is a total of $300 million; [spoiler]you might notice after your first two calculations that there's not enough money left for either of the final 2 categories to total $75 million.[/spoiler]

Autos: (50% of $200 mill) + (10% of $100 mill) = $110 million
Textiles: (30% of $200 mill) + (20% of $100 mill) = $80 million
Food: (5% of $200 mill) + (40% of $100 mill) = $50 million
Tech: (15% of $200 mill) + (30% of $100 mill) = $60 million

Final Answer: B

GMAT assassins aren't born, they're made,
Rich

Contact Rich at [email protected]

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