jee-main 2016 Q63

jee-main · India · 10apr Combinations & Selection Basic Combination Computation
If $\frac { { } ^ { n + 2 } C _ { 6 } } { { } ^ { n - 2 } P _ { 2 } } = 11$, then $n$ satisfies the equation:
(1) $n ^ { 2 } + n - 110 = 0$
(2) $n ^ { 2 } + 2 n - 80 = 0$
(3) $n ^ { 2 } + 3 n - 108 = 0$
(4) $n ^ { 2 } + 5 n - 84 = 0$
If $\frac { { } ^ { n + 2 } C _ { 6 } } { { } ^ { n - 2 } P _ { 2 } } = 11$, then $n$ satisfies the equation:\\
(1) $n ^ { 2 } + n - 110 = 0$\\
(2) $n ^ { 2 } + 2 n - 80 = 0$\\
(3) $n ^ { 2 } + 3 n - 108 = 0$\\
(4) $n ^ { 2 } + 5 n - 84 = 0$