Предмет: Математика, автор: masha99811

в классе 35 учеников.20 из них посещают урок математики,11-биологии, 10-не посещают ни матиматический, ни биологический кружки.СКОЛЬКО УЧЕНИКОВ ПОСЕЩАЮТ И МАТЕМАТИЧЕСКИЙ И БИОЛОГИЧЕСКИЙ КРУЖОК

Ответы

Автор ответа: RoyalNelly

31 учеников посещают.

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