A) 40
B) 38
C) 48
D) 50
Correct Answer: B
Solution :
Last number = Sum of 20 numbers - sum of first 12 numbers - sum of next 7 numbers \[=20\times 12-11\times 12-7\times 10=\] \[240-132-70=38\]You need to login to perform this action.
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