Question
Download Solution PDFयदि C(30, n - 3) = C(30, n + 3) हो तो n किसके बराबर है?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFअवधारणा:
nCx = nCy, तो x = y या x + y = n
गणना:
दिया गया है
C(30, n - 3) = C(30, n + 3)
30Cn - 3 = 30Cn + 3
n - 3 + n + 3 = 30
2n = 30
n = 15
Additional Information
संयोजन सूत्र
माना n और r ऐसे पूर्णांक हैं जैसे कि 0 ≤ r ≤ n हो तो
nCr = \(\rm \frac{n!}{r! (n -r)!}\)
nPr = nCr r!
nCn - r = nCr
nCr + nCr - 1 = n + 1Cr
n n - 1Cr - 1 = (n - r + 1) nCr - 1
Last updated on May 31, 2025
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