Question

Is the answer 0 or 17 ?!, how do i find n(a)

Answer 1

It is given that

`n(B)=35,n(A\cap B)=17,\text{ n}(A\cup B)=52`

To find the value of n(A) , use the formula

`n(A\cup B)=n(A)+n(B)-n(A\cap B)`

Substitute the values

`52=n(A)+35-17`
`n(A)=52-35+17=34`

Hence the value of n(A) is 34.