Brent rolls a fair dodecahedral die with numbers 1,2,3,...,11,12 on its faces. What is the expected number he obtains? Express your answer in a decimal.

9 sides have 1 digit (1, 2, 3, ..., 9) and 3 sides have 2 digits (10, 11, 12)

Total number of digits: 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 2 + 2 + 2 = 15

Divide this value by the number of sides:

15 /12 = 1.25

Hope this helped~Hannah

That answer is wrong.

I know the answer is wrong

But so is depression~Hannah

Sum of the faces 1 + 2 + 3......+ 12 = 78

78/12 = 6.5