Question

Suppose that A={1,3,8}, B={1,4}, C={1,3,4,8}, and D={1,4,8}. Which sets are subsets of each other?

I got that A, B, and D are subsets of C but I'm being told I have the wrong answer so are there any I'm missing?

Answer 1

I think the key is at "each other" . That means A\(\subseteq\)B and B\(\subseteq\)A
Or they ask for which are equal.

Answer 2

if two sets are subsets of "each other"
then the 2 sets must be equal!

Answer 3

The only other one I could find is that B is a subset of D, but there's not an option for that and I'm not sure you can flip is around and say D is a subset of B

Answer 4

Can you post the options?

Answer 5

what are the options given ?

Answer 6

C is a subset of B
C is a subset of D
D is a subset of B
A is a subset of D
C is a subset of A
A is a subset of B
B is a subset of A
D is a subset of C
A is a subset of C
B is a subset of C

Answer 7

only last 3 options are correct.
you're correct!

Answer 8

whowver told you that you're wrong, is wrong :P

Answer 9

That's why I'm confused why it's telling me I'm wrong

Answer 10

either that, or there the question itself is wrong or mis-typed :P

Answer 11

Wait, I just noticed there's a little line underneath the sideways U. Does that make a difference?

Answer 12

actually, yes

Answer 13

What difference does it make?

Answer 14

without the line, its called "proper" or strict subset


The set A = {1, 2} is a proper subset of B = {1, 2, 3}, thus both expressions A ⊆ B and A ⊊ B are true.

The set D = {1, 2, 3} is a subset of E = {1, 2, 3}, thus D ⊆ E is true, and D ⊊ E is not true (false).

Answer 15

if you see question marks in a diamond shaped figure, refresh your page

Answer 16

so in your choices,
where do you see the line and where you do not ?

Answer 17

The top 4 have the little line, the rest don't

Answer 18

so it still does not make a difference in final answer!
only the last 3 are still correct :P