A) 120
B) 10
C) 360
D) 5
Correct Answer: D
Solution :
\[^{10}{{C}_{r}}{{=}^{10}}{{C}_{r+2}}\Rightarrow r+r+2=10\Rightarrow r=4\] \[\therefore \]\[^{5}{{C}_{r}}{{=}^{5}}{{C}_{4}}=\frac{5\ !}{1\ !\ 4\ !}=5\].
You need to login to perform this action.
You will be redirected in
3 sec
