Question

If set D is a subset of set E, then which of the following is true?


-D ∩ E = D
-D ∩ E = E
-D ∩ E = Ø


would it be the first one D ∩ E = D?

Answer 1

B

Answer 2

could you explain it? (my lesson didn't explain it well)

Answer 3

just google it the answer is most likely B

Answer 4

one sec

Answer 5

i would've googled it anyways, but there are no good explanations.

Answer 6

do you know what a subset is ?

Answer 7

slightly.

Answer 8

wait its A!!!! JUST GOOGLE IT RIGHT NOW LOL

Answer 9

woohoOO :D

Answer 10

reallyprettyboy, i don't think you understand. i want and explanation. :|

Answer 11

oh ok i'll find one dont worry :)

Answer 12

if A is the subset of B, then all elements of A are present in B
ex : A={1,2}
B={1,2,3,4}
notice all elements of A are in B
ok ?

Answer 13

ah, okay.

Answer 14

so, if now you have to find the intersection (common elements)
the it would be entire set A, right ?

Answer 15

similarly, since D is a subset, intersection is set D itself.

Answer 16

oh okay:) so it is D ∩ E = D.

Answer 17

yup.... :)

Answer 18

yes! :)

Answer 19

yay, thank you two:)

Answer 20

welcome ^_^

Answer 21

you're very welcome... :D