Mathematics, 13.02.2020 04:45, ElegantEmerald

Suppose that among a group of sports enthusiasts, 50 reported they enjoyed watching synchronized boxing, 40 reported enjoying extreme knitting. further, when queried again, 20 of these reported that they enjoyed watching both activities.

How many sports enthusiasts enjoy watching synchronized boxing or extreme knitting?

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Suppose that among a group of sports enthusiasts, 50 reported they enjoyed watching synchronized box...