A) \[^{20}{{C}_{10}}\times {{2}^{10}}\]
B) \[^{20}{{C}_{10}}\times {{30}^{20}}\]
C) \[^{20}{{C}_{10}}\times {{30}^{10}}\]
D) \[^{20}{{C}_{10}}\times {{2}^{20}}\]
Correct Answer: A
Solution :
[a] Matches whose prediction are correct can be selected in \[^{20}{{C}_{10}}\]ways. Now each wrong prediction can be made in 2 ways. Thus, the total number of ways is \[^{20}{{C}_{10}}\times {{2}^{10}}\]
You need to login to perform this action.
You will be redirected in
3 sec
