Let R={x ∣ x∈ N,x is a multiple of 3 and x ≤ 100} and S={x ∣ x ∈ N,x is a…
2023
Let R={x ∣ x∈ N,x is a multiple of 3 and x ≤ 100} and S={x ∣ x ∈ N,x is a multiple of 5 and x<100}.
What is the number of elements in (R∩S)×(S∩R)?
- A.
36
- B.
33
- C.
20
- D.
6
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Correct answer: A
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