Question

The average of 17 numbers is 80. The first seven

Q: Answer-The average of 17 numbers is 80. The first seven numbers have an average of 100, and the last five n...

Let ninth number is 10x So, tenth number 1.20 10x 12x Eleventh number 8509 1100 12x 34x3 So, 10x 12x 34x3 80 17 7 100 5 72 1360 700 360 300 Or, 100x3 300 Or, x 9 So, tenth number 12 9 108

numbers have an average of 100, and the last five numbers have an average of 72. The tenth number exceeds the ninth number by 20%, and the eleventh number is reduced by (50/9)% from the tenth number. Determine the value of the tenth number.

A 84

B 96

C 108

D 120

E 132