यदि \(A=\{1,2,3,4,5,6,7\}\) और \(B=\{0,1\}\) हों, तो (A) से (B) में ऐसे कितने फलन हैं जिनमें ठीक (4) इनपुटों की छवि (1) हो?
If \(A=\{1,2,3,4,5,6,7\}\) and \(B=\{0,1\}\), how many functions from (A) to (B) have exactly (4) inputs with image (1)?
Explanation opens after your attempt
C. (35)
Concept
Exactly four of the seven inputs must be mapped to (1). The number is \(\binom{7}{4}=35\).
Why this answer is correct
The correct answer is C. (35). Exactly four of the seven inputs must be mapped to (1). The number is \(\binom{7}{4}=35\).
Exam Tip
सात इनपुटों में से ठीक चार को (1) पर भेजना है। संख्या \(\binom{7}{4}=35\) है।
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