Question

20 POINTS PLEASE HELP ME!! :(
Questions are attached

Answer 1

You can calculate the expected age as the sum of individual ages weighted (multiplied) by the corresponding fraction:

expected age: 1/4* 5 + 1/2*6 + 1/8*7 + 1/8*9 = 5/4 + 6/2 + 7/8 + 9/8 =

50/8 = 6.25

the answer is, the expected age is 6.25 years