Question

A=(x:x is a factor of 18) B=(x:x is a factor of 24) find A u B and A n B

Answer 1

Answer: n(A)=8.

Step-by-step explanation:

Since we have given that

A={x:x is a factor of 24}

So, A would contain factors of 24 which are given as :

1×24=24

2×12=24

3×8=24

4×6=24

So, the factors of 24 = 1,2,3,4,6,8,12,24.

So, The set of A becomes {1,2,3,4,6,8,12,24}

And n(A) means the number of elements in the set A.

So, n(A)=8

Hence, n(A)=8.