Question

The average of 18 numbers is 70. The first eight numbers have an average of 90, and the last five numbers have an average of 48. The eleventh number exceeds the tenth number by 20%, and the twelfth number is reduced by (50/9)% from the eleventh number. Determine the value of the eleventh number.

A 84
B 96
C 108
D 120
E 132
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