SOLUTION: If C = {counting numbers} and I = {integers}, then C ∩ I is which of the following? (A) {whole numbers} (B) {counting numbers} (C) {non negative integers} (D) {p

Algebra.Com
Question 309764: If C = {counting numbers} and I = {integers}, then C ∩ I is which of the following?

(A) {whole numbers}
(B) {counting numbers}
(C) {non negative integers}
(D) {positive real numbers}
(E) {even integers}
Found 2 solutions by Edwin McCravy, amalm06:
Answer by Edwin McCravy(20054)   (Show Source): You can put this solution on YOUR website!
Think of ∩ as being crossed like this: ∩ 
and since ∩ is the first letter of the word ∩ND,
we know that ∩ means "AND". Now

C ∩ I  

means 

C ∩ I 

which means

C ∩ND I

so in order for a number to be both a Counting number ∩ND
an Integer, and since every Counting number IS also an Integer, it must be
a Counting number.  So the answer is (B).

Edwin
Answer by amalm06(224)   (Show Source): You can put this solution on YOUR website!
The answer is B). The question is giving you two sets, N and Z, and asking which elements are common to both sets. Since Z-N=Z^-, the answer is simply N itself.
RELATED QUESTIONS

The number 0 is NOT an example of which of the following? (A) Real numbers (B) Rational (answered by stanbon)
Name the sets of numbers to which -10 belongs. a: whole numbers, integers, rational... (answered by Fombitz)
Name the set or sets to which each number belongs. If the number is rational, use the... (answered by KMST)
Which of the following sets is closed under division? a. nonzero whole numbers b.... (answered by Edwin McCravy,Mathtut)
If S is the sum of the first 10 even counting numbers and n is the sum of the first 10... (answered by greenestamps)
tell whether each given set is closed under the operation shown. a)(whole numbers),x... (answered by tommyt3rd)
Write the contrapositive of the statement. Then use the contrapositive to determine... (answered by richard1234)
If the sum of two counting numbers is an even counting number, then the product of the... (answered by Alan3354,josgarithmetic)
if a, b, and c are whole numbers, the expression a(b+c) must be even when which of the... (answered by CubeyThePenguin)