Question

if AsubsetofB,n(A)=4,n(B)=7then(A-B)=
​

Answer 1

Answer:

n(A-B) = 0

Step-by-step explanation:

as  A is a subset of B all the elements of A are contained in B .  

the resultant of A-B is the set of the elemnets that are contained in setA but not present in setB  . as all the elements in setA is also present in setB there is no disticnt elements in setA .

hence n(A-B) = O

AND

A-B = NULL SET

Answer 2

Answer:

Answer is in the above picture

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