Question

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 1

First you identify the set B ^ C which contains the common numbers between B and C.

Answer 2

3 0 5 9 ?

Answer 3

Identifica o conjunto B^C,onde tem os numeros do conjunto Be C

Answer 4

Yeah, then you identify the even numbers in that set.

Answer 5

is 0 even?

Answer 6

@jodrannyah i dont speak spanish...

Answer 7

yes

Answer 8

ok so it would be 2 even numbers right?
0 and 6

Answer 9

But 6 isn't in the set you found earlier

Answer 10

but it has the ~ sign outside the (b ^ c) so that means the numbers not included in 3 0 5 9 i thought

Answer 11

Never seen that sign before, did they give a definition as of what it means ?

Answer 12

yeah its everything not in that set

Answer 13

Oh I see... So that would be A-(B ^ C)
aka all the numbers in A that are not in (B ^ C)

Answer 14

Oh okay! so it would be 5 even numbers because i don't duplicate right?

Answer 15

Not quite, give me the set A-(B ^ C) you got

Answer 16

2 4 6 8 0 0 6 ,
those are all the even numbers because it wanted how many even numbers

Answer 17

But 0 figures in B ^ C so it can't be on your set

Answer 18

oh so 4 numbers?

Answer 19

yeah !

Answer 20

thank you!!

Answer 21

anytime :)

Answer 22

tell your teacher this question is flawed, we do not repeat elements in a set, so {2,2,3} makes no sense.

Answer 23

:)