QJEEAdv24Ma5c14: JEE Advanced 2024 Mathematics - Class 11 JEEAdv24Ma5c14 Solution: If , then the value of is _____

$|a-b| \geq 2 \text { or }|b-a|=2$

Total

$\begin{array}{lll}a=1 & b=3,4,5,6 & 8 \\a=2 & b=4,5,6 & 6 \\a=3 & b=5,6 & 4 \\a=4 & b=6 & 2 \\\text { sum }=20\end{array}$

$\begin{aligned}& \mathrm{n}(\mathrm{X})={ }^{20} \mathrm{C}_6={ }^{\mathrm{m}} \mathrm{C}_6 \\& \mathrm{~m}=20\end{aligned}$