यदि \(U=\{a,b,c,d,e,f,g,h\}\), \(A=\{a,b,c,d\}\) और \(B=\{c,d,e,f\}\), तो \(A'\triangle B'\) में कितने तत्व हैं?
If \(U=\{a,b,c,d,e,f,g,h\}\), \(A=\{a,b,c,d\}\) and \(B=\{c,d,e,f\}\), how many elements are in \(A'\triangle B'\)?
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B. (4)
Simple Explanation
(A'={e,f,g,h}) और (B'={a,b,g,h}) हैं। केवल एक में आने वाले तत्व (a,b,e,f) हैं, इसलिए (4) तत्व हैं। / (A'={e,f,g,h}) and (B'={a,b,g,h}). Elements in exactly one are (a,b,e,f), so there are (4).
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