Question

The average of 18 numbers is 70. The first eight

Q: Answer-The average of 18 numbers is 70. The first eight numbers have an average of 90, and the last five nu...

Let tenth number is 10x So, eleventh number 1.20 10x 12x Twelfth number 8509 1100 12x 34x3 So, 10x 12x 34x3 70 18 8 90 5 48 1260 720 240 300 Or, 100x3 300 Or, x 9 So, eleventh number 12 9 108

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