A survey shows that 63% of the people watch a news channel where as 76% watch another channel. If x% of the people watch both the channels then
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n(u) =100%
n(n)=63%
n(a)=76%
n(n intersection a) =?
n(n complement a) =0
n(u) =n(n) +n(a) - n(n intersection a) +n(n complement a)
or, 100=63+76-x+0
or,100=139-x
or,100-139=-x
or, - 39=-x
Therefore, x=39
So, 39 people like both
n(n)=63%
n(a)=76%
n(n intersection a) =?
n(n complement a) =0
n(u) =n(n) +n(a) - n(n intersection a) +n(n complement a)
or, 100=63+76-x+0
or,100=139-x
or,100-139=-x
or, - 39=-x
Therefore, x=39
So, 39 people like both
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