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# ­For each of six archaeological excavation sites, the table shows whet

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Re: ­For each of six archaeological excavation sites, the table shows whet [#permalink]

chetan2u wrote:
­
All Data Insight question: Tables [ Official Guide DI Review 2023-24]

For each of six archaeological excavation sites, the table shows whether pottery, jewelry, or statuettes were found at that site.

SitePotteryJewelrySatuettes
Ayesyesno
Bnonoyes
Cyesnoyes
Dyesyesno
Enonoyes
Fyesyesno
(Sort ↕ the table by clicking on the headers)

For each of the following statements about the sites in the table, select Yes if the statement is accurate based on the information provided. Otherwise, select No

­
The question is fairly tricky but can be simplified by using the concept of necessary and sufficient conditions. Keep in mind that much of non-Math logic that we talk about is based on necessary and sufficient conditions.

"Only" indicates necessary conditions. 'Statuettes "no" is necessary for Jewelery "yes"'
Check everywhere where you have "yes" for jewellery. Do you have "no" for Statuettes there? Yes you do.

Jewelry was found only at sites where pottery was also found.

"Only" indicates necessary conditions. Pottery "yes" is necessary for Jewellery "yes"
Check everywhere where you have "yes" for jewellery. Do you have "yes" for Pottery there? Yes you do.

Each/Every/Whenever/All indicate sufficient conditions. If pottery was "no", statuettes were "yes"
Check everywhere where pottery was "no". Are statuettes "yes"? Yes they are.