# Math Help - Set A intercept B'

1. ## Set A intercept B'

This perhaps a fairly trivial question for most. But as I haven't done this for years I just needed someone to tell me if I was correct.

The universal set E = {Whole numbers}
A = {multiples of 5}
B = {multiples of 3}

1) What are 3 members of A intercept B'?

Is the answer say 5, 10 and 20? It is basically anything which belongs to A but does not include multiples of 3. Am I correct?

2) C = {multiples of 10}. What are 3 members of A intercept B intercept C'?

Could it be say 15, 45 and 75

2. Originally Posted by Natasha1
This perhaps a fairly trivial question for most. But as I haven't done this for years I just needed someone to tell me if I was correct.

The universal set E = {Whole numbers}
A = {multiples of 5}
B = {multiples of 3}

1) What are 3 members of A intercept B'?

Is the answer say 5, 10 and 20? It is basically anything which belongs to A but does not include multiples of 3. Am I correct?

2) C = {multiples of 10}. What are 3 members of A intercept B intercept C'? Could it be say 15, 45 and 75
Yes, they are correct.

3. Correct!