Question

The set A represents even numbers to 30.
A = {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30}

The set B represents multiples of 4 to 28.
B = {4, 8, 12, 16, 20, 24, 28}

How many elements are in the set A ∩ B?

Answer 1

So how many numbers are in Both A AND B?

Answer 2

all numbers in B

Answer 3

23

Answer 4

not the sum of the 2....let me rephrase that...how many of the SAME numbers are in both A AND B?

Answer 5

so if there is a 4...in A AND B...that's 1...and so on etc...

Answer 6

if it is a multiple of four is even too

Answer 7

so its 7?

Answer 8

I think it is 7

Answer 9

Right, as @RaphaelFilgueiras is pointing out...EVERY number that is in B...is ALSO in A...because all multiples of 4...are even...so they are ALL in A.

So how many numbers are in B?

Answer 10

and yes, it is 7

Answer 11

can you help me with one more.

Answer 12

Sure

Answer 13

An individual's phone number contains seven digits, not including the area code, from the set A shown below.
A = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}

Set B represents the digits in Brent's phone number.
B = {5, 5, 5, 3, 0, 9, 9}

Set C represents the digits in Charlie's phone number.
C = {8, 6, 7, 5, 3, 0, 9}

How many even numbers are in the set ∼(B ∩ C)?

Answer 14

would it only be 2?

Answer 15

Yes ma'am :)

Answer 16

okay, thank youu.

Answer 17

anytime!