Предмет: Математика, автор: ZhenjaMax

50 школьников сдавали экзамены по математике и по русскому языку.
4 ничего не сдали.
37 - математику.
42 - русский язык.
Сколько школьников сдали оба экзамена?
а) 33, б) 37, в) 29.

Ответы

Автор ответа: Туранова

А) 33.
50-4=46 что-то сдавали
46-42=4 не сдавали русский
37-4=33 не сдавали математику
42-33=9 сдавали один
9+4+4=17 не сдавали ничего или сдавали один
50-17=33 сдавали два

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