Math, asked by bdhdhdd, 1 month ago

In a survey of 100 people 80 watch tv series friends but 70 people watch tv series got so how many people watch both the series

Answers

Answered by devilmaro1025
1

A u B = n*A + n*B - A intersection B

100 = 80+ 70 - A and B both

100 - 150 = - (A and B both )

- 50 = - ( A and B both )

A and B both = 50

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