पास्कल पहचान से \(\binom{6}{2}+\binom{6}{3}\) किसके बराबर है?
Using Pascal's identity, \(\binom{6}{2}+\binom{6}{3}\) is equal to which expression?
Explanation opens after your attempt
Correct Answer
C. \(\binom{7}{4}\)
Concept
By Pascal's identity, \(\binom{n}{r}+\binom{n}{r+1}=\binom{n+1}{r+1}\). Hence the correct expression is \(\binom{7}{3}\).
Why this answer is correct
The correct answer is C. \(\binom{7}{4}\). By Pascal's identity, \(\binom{n}{r}+\binom{n}{r+1}=\binom{n+1}{r+1}\). Hence the correct expression is \(\binom{7}{3}\).
Exam Tip
पास्कल पहचान से \(\binom{n}{r}+\binom{n}{r+1}=\binom{n+1}{r+1}\) होता है। इसलिए उत्तर \(\binom{7}{3}\) नहीं, सही \(\binom{7}{3}\) है।
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