Jacob rode his bicycle 144 miles in 9 weeks, riding the same distance each week. Lesley rode her bicycle 84 miles in 6 weeks, riding the same distance each week. How many more miles did Jacob ride his bicycle than Lesley per week they rode?

Jacob rode his bicycle 2 miles per week more than Lesley per week.  

Step-by-step explanation:

We are given the following in the questions:

Jacob rode his bicycle 144 miles in 9 weeks.

Number of miles rode in 1 week by Jacob =

Lesley rode her bicycle 84 miles in 6 weeks.

Number of miles rode in 1 week by Lesley =

Thus, Jacob rode his bicycle more than Lesley by

Thus, Jacob rode his bicycle 2 miles per week more than Lesley per week.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0