A) 20
B) 21
C) 23
D) 18
Correct Answer: C
Solution :
Total of 15 numbers \[=15\times 7=105\] Total of first 8 numbers \[=8\times 6.5=52\] and total of last 8 numbers \[=8\times 9.5=76\] \[\therefore \] Middle number \[=76+\text{ }52-105=23\]You need to login to perform this action.
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