Question

if n(A)=5,n(AuB)=9,n(B)=6then find n(AnB)​

Answer 1

Answer:

n(AnB)=2

Step-by-step explanation:

Given that

n(A)=5

n(AuB)=9,

n(B)=6

n(A n B)=?

we know that

n(AuB)=n(A)+n(B)-n(AnB)

now put the values

9=5+6-n(AnB)

or n(AnB)=5+6-9

or n(AnB)=11-9

or n(AnB)=2