Question

Which of the following is a subset of {1, 4, 7, 10, 13, 16, 19, 22}?
Select one of the options below as your answer:
A.{2,5,8}
B.{7,13,22}
C.{10,13,17}
D.{13,15,19}

Answer 1

all the elements in a subset must be in the original set. A is wrong because 2 isnt in the original set. C is wrong because 17 isnt in the original set. D is wrong because of the 15. B is the answer because 7, 13 and 22 are all in the original set.

Answer 2

yes B is the answer as all the elements in set B ARE IN the universal set.