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Mathematics, 10.12.2020 16:40 micky956

Žáci 1. Ročníku si kupovali knížky, aby se nenudili o nadcházejících prázdninách. V blízké prodejně právě dostali dlouho očekávanou detektivku a strašidelný horor. Z 31 žáků třídy si 22 koupilo horor. Pouze jednu z těchto knih si koupilo 12 žáků. Žádnou z těchto knih si nekoupili dva žáci. Kolik žáků si koupilo detektivku? Napište jen výsledné číslo. *

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Žáci 1. Ročníku si kupovali knížky, aby se nenudili o nadcházejících prázdninách. V blízké prodejně...
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