which of the following sets is a subset
of A?
A:5,25,15,10,20,30
not just and answer
A.5,15,60
B.10,20,50
C.5,10,20
D.15,30,60
well i got the answer C
Right.
http://www.mathsisfun.com/sets/sets-introduction.html
but i'm not so good at subsets can you explain, so i can maybe understand in a different way.
Please study the site I linked above.
To determine which of the given sets is a subset of set A, you need to check if every element of the given set is also present in set A.
Set A: {5, 25, 15, 10, 20, 30}
Let's go through the options one by one:
A. {5, 15, 60}
- Is 5 in set A? Yes.
- Is 15 in set A? Yes.
- Is 60 in set A? No.
Since one element (60) in set A is not present in set A, option A is not a subset of set A.
B. {10, 20, 50}
- Is 10 in set A? Yes.
- Is 20 in set A? Yes.
- Is 50 in set A? No.
Similar to option A, one element (50) in set B is not present in set A, so option B is not a subset of set A.
C. {5, 10, 20}
- Is 5 in set A? Yes.
- Is 10 in set A? Yes.
- Is 20 in set A? Yes.
All three elements in set C are present in set A. Therefore, option C is a subset of set A.
D. {15, 30, 60}
- Is 15 in set A? Yes.
- Is 30 in set A? Yes.
- Is 60 in set A? No.
Similar to options A and B, one element (60) in set D is not present in set A, so option D is not a subset of set A.
So, after analyzing each option, we find that option C {5, 10, 20} is the only set that is a subset of set A.