If ^n C_ 12 = ^n C_ 8 , is then n: 1. 20 2. 12 3. 6 4. 30 - Vidyadip

Question

If ${^\text{n}}\text{C}_{\text{12}}={^\text{n}}\text{C}_{\text{8}},$ is then n:

20
12
6
30

✓

Answer

20

Solution:

$\text{n}=12+8=20$

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