\(यदि (A={x\in \mathbb{N}:x\leq 20\) and x is divisible by \(5}) और (B={5,10,15,20}) है, तो सही कथन क्या है\)?
\(If (A={x\in \mathbb{N}:x\leq 20\) and x is divisible by \(5}) and (B={5,10,15,20}), what is the correct statement\)?
Explanation opens after your attempt
A. (A=B) और (n(A)=4)(A=B) and (n(A)=4)
Concept
Natural numbers up to (20) divisible by (5) are (5,10,15,20).
Why this answer is correct
These are exactly the elements of (B), and there are (4) of them.
Exam Tip
The boundary (20) is included because \(\leq\) is given. चरण 1: (20) तक (5) से विभाज्य प्राकृतिक संख्याएँ (5,10,15,20) हैं। चरण 2: ये ठीक (B) के अवयव हैं और कुल (4) हैं। चरण 3: सीमा शामिल है क्योंकि \(\leq\) दिया गया है।
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