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Lect 18: Properties of Combination | Exercise 3.6 P2 | Permutation & Combination| JEE,CET, All Board
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find n if
nC8=nC12 | 23C3n=23C2n+3 | 21C6n=21C(n2+5) | 2nCr-1=2nCr+1 | nCn-2=15
Find r, if 11C4+11C5+12C6+13C7=14Cr
Find the value of sumation r= 1 to 4 (21-r)C4
6P2=nC2 | 2nC3:nC2=52:3 | nCn-3=84
Find n & r if nPr=720 and nCn-r=120 | nCr-1:nCr:nCr+1=20:35:42
If nPr=1814400 and nCr=45 find n+4Cr+3
if nCr-1=6435, nCr=5005, nCr+1 = 3003 find rC5
nC8=nC12 | 23C3n=23C2n+3 | 21C6n=21C(n2+5) | 2nCr-1=2nCr+1 | nCn-2=15
Find r, if 11C4+11C5+12C6+13C7=14Cr
Find the value of sumation r= 1 to 4 (21-r)C4
6P2=nC2 | 2nC3:nC2=52:3 | nCn-3=84
Find n & r if nPr=720 and nCn-r=120 | nCr-1:nCr:nCr+1=20:35:42
If nPr=1814400 and nCr=45 find n+4Cr+3
if nCr-1=6435, nCr=5005, nCr+1 = 3003 find rC5
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