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Yaoicx681
04.02.2020 •
Mathematics
The results of surveying 100 residents of a city reported that 40 read the daily morning paper, 70 read the daily evening paper & 20 read neither. how many: .1. read at least 1 paper? 2. read both? 3. read exactly one daily paper?
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Ответ:
Ответ:
130 - x = 100
-x = 100 - 130
-x = -30
x = 30
read daily morning paper = 10
read the daily evening paper = 40
read both papers = 30
read neither paper = 20
how many read at least one paper : 80
read both = 30
read exactly one = 50
Ответ: