A) 36
B) 21
C) 18
D) 12
E) None of these
Correct Answer: B
Solution :
Explanation: [b] is correct. \[\frac{13+14+11}{2}=\frac{38}{2}=19;\frac{9+8+7}{2}=\frac{24}{2}=12\] Similarly,You need to login to perform this action.
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