Asmall train at an amusement park is carrying passengers. half of the passengers are 6 years old, 1/10 are 7 years old, 1/5 are 8 years old, and 1/5 are 9 years old.

what is the expected age for one of the passengers on the train?

question 4 options:

6 years

7.1 years

8 years

8.5 years