Asmall train at an amusement park is carrying passengers. half of the passengers are 4 years old, 1/10 are 5 years old, 3/10 are 6 years old, and 1/10 are 7 years old. what is the expected age for one of the passengers on the train? a. 5 years b. 5.5 years c. 6 years d. 6.1 years

In order to find the expected age, we must multiply the probability of picking each child by their age, then add them all up. Like this:

E(x) = 4(1/2) + 5(1/10) + 6(3/10) + 7(1/10)
E(x) = 5 years

By doing this we are giving each age group a percentage of the entire population.

Hope this helps!

29. because you will divide each number of months by 12 to find the number of years. which would mean, 5, 12.5, 16, 45, 50, 72.5. which is crazy. anyhow, i think you find the median in the middle. and yea hope your test goes good