Question

two sets such that n(X)=17, n(Y)=23 and n(XUY)=38 find n(
XY)
6. Check whether the following sets are disjoint or not if not, write reason {1,2,3,4) and
{x: x is a natural number}.
7. Write the following intervals in set builder form i)(-23,6) ii) (-8,-1]​

Answer 1

Answer:

1 n(AnB) = 2

2. joint, as they have 1,2,3,4 in common

3. (I) {-23<x<6 : x is an integer}

(ii) {-8<x<=-1 : x is an integer}