यदि \(A=\{1,2,3,4\}\) और \(B=\{0,1\}\) हों तो कितने फलन \(f:A\to B\) ऐसे हैं जिनमें कम से कम एक इनपुट की छवि (1) हो?
If \(A=\{1,2,3,4\}\) and \(B=\{0,1\}\), how many functions \(f:A\to B\) have at least one input with image (1)?
Explanation opens after your attempt
C. (15)
Concept
There are \(2^4=16\) total functions, and only the all-zero function is excluded. Hence there are (15) functions.
Why this answer is correct
The correct answer is C. (15). There are \(2^4=16\) total functions, and only the all-zero function is excluded. Hence there are (15) functions.
Exam Tip
कुल \(2^4=16\) फलन हैं और केवल सभी मान (0) वाला (1) फलन हटेगा। इसलिए (15) फलन हैं।
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