Предмет: Математика, автор: dilaida005

«Әлем» университетінде 118 студент бар. Олардың 61-і журналистика курсын таңдаған,
экономика-57 „филология- 50. Журналистика және экономика курстарын 23 студент таңдаған,
экономика және филология -27 , филология және журналистика -20 . Ал үш курсты да 13 студент
таңдаған. Бір ғана курс таңдаған студент санын табыңыз.
А)69
В)118
C)80
Д)67

Ответы

Автор ответа: orazaitalshyn

1

Ф+Э=27 : 27-13=14.

61-Ж ; 57-Э; 50-Ф

Ж+Ф=20 20-13=7

Ж+Э=23 23-13=10

61-(10+7+13)=31 ; 57-(13+14+10)=20; 50-(7+13+14)=16.

31+20+16=67

dilaida005: Спасибоооо

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