A) 14
B) 20
C) 18
D) 22
Correct Answer: C
Solution :
Sum of 17 numbers \[=45\times 17=765\] Sum of the first 9 numbers \[=9\times 51=459\] Sum of the last 9 numbers \[=9\times 36=324\] \[\therefore \] 9th number \[=459+324-765=18\]You need to login to perform this action.
You will be redirected in
3 sec