Which of the following is a subset of set A?
A: {children between the ages of 3 and 7}

{children over 7}

{children 3 years old}

{children of all ages}

{children under 3}

Question

Which of the following is a subset of set A?
A: {children between the ages of 3 and 7} 

 {children over 7} 

 {children 3 years old} 

 {children of all ages} 

 {children under 3}

mathstudent55 · Answer

Every element of a subset must be in the set.
In this case, does children between the ages of 3 and 7 include 3 and 7 year olds?

anonymous · Answer

?

mathstudent55 · Answer

Let's say that set A includes children who are 3, 4, 5, 6, and 7 years old.
Which is the only choice of a subset that has an age included in set A?

anonymous · Answer

?

anonymous · Answer

so which is it ? cause i really dont know .

mathstudent55 · Answer

Choice A is children 8, 9, 10, ... years old. Is that 3 to 7?
Choice B is children 3 years old. That is part of 3, 4, 5, 6, 7 years old
Choice C is all ages, so many are not only 3 to 7
Choice D is 0, 1, 2, so that is not included in 3, 4, 5, 6, 7