Magnetic Field

Step 1: Find the intersection of sets and . The intersection of two sets contains the elements that are present in both sets. We have: The common elements are . Step 2: Find the number of elements in the intersection. The number of elements in is 3. Thus, .

Step 1: Define the sets.
We are given the following sets:
is the set of odd numbers less than 6: is the set of prime factors of 30. First, find the prime factors of 30: Thus, . Step 2: Compare the sets and .
Set
Set
Clearly, because the elements and are not present in both sets. Step 3: Final answer. The correct answer is .