Question

Can Anyone help totally stuck on this question!!

The zip code of a location consists of five digits chosen from the set D shown below. D = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} The set M represents the digits in one of the zip codes for Miami. M = {3, 3, 1, 9, 0} The set C represents the digits in one of the zip codes for Cooper City. C = {3, 3, 3, 3, 0} How many prime numbers are in the set ~(M U C)?

Answer 1

answers:
A. 1
B. 2
C. 3
D. 4

Answer 2

@ganeshie8
@radar
@mathmale
@mathslover

Answer 3

I think it is very nicely explained here : http://openstudy.com/study#/updates/4fdebbeee4b0f2662fd55065

Please have a look at the explanation provided there, and if you still get any kind of doubts/problems in understanding the question, let me know! I will help you out.

Answer 4

Ok thank you

Answer 5

I think it would be C.

Answer 6

because you have 8,6, and 4

Answer 7

Oh! From where did you get 8, 6 and 4?

We have to consider M and C only :

M \(\cup \) C = ?

Answer 8

There in the orignal set

Answer 9

like really i dont know what m u c is

Answer 10

M \(\cup\) C means M union C

http://www.mathsisfun.com/sets/sets-introduction.html

Answer 11

A?

Answer 12

Do you know , why is it A?

Answer 13

Its says M ( union ) C right so i have to use the lines from M and C and the only ne they have in common that is prime is 0

Answer 14

ne = number

Answer 15

No, that's not the reason. Please refer to the provided link, I am sure that the link will strengthen your concepts.

Answer 16

Ah why you make it so hard :P

Answer 17

It is hard unless you know about "Sets". Sorry!

Answer 18

Ok so 3 is prime? right?

Answer 19

Atleast that is what she said before.

Answer 20

Wait so it would be A. or B. because of all the 3's ok but dont they combine?

Answer 21

We'll count only one - 3 and as 3 is prime, so there will be only 1 prime.