in a survey of 500 TV views , it was found that 285 watch cricket , 195 watch football and 115 watch tannis . also , 45 watch both cricket and football, 70 watch both cricket and tennis and 50 watch football and tennis . if 50 do not watch any game on tv . then the no. of views watch all three games is ?

Explanation

Let,

`n(U)` , be the total number of television viewers,


`n(A)` be the number of people who watch football,


`n(B)` be the number of people who watch hockey and


`n(C)` be the number of people who watch basket ball.
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