Mathematics - Permutation & Combination Question with Solution | TestHub

$p=1,q=1,2,3,4,5,6\Rightarrow 6$ $p=2,q=1,3,4,5,6\Rightarrow 3[\because (2,4),(2,6)]$ $p=3,q=1,2,4,5,6\Rightarrow 4[\because (3,6)]$ $p=4,q=1,3,5,6\Rightarrow 3[\because (4,6)]$ $p=5,q=1,2,3,4,6\Rightarrow 5$ $p=6,q=1,5\Rightarrow 2$