Linda ran 2 4/5 miles in 0.4 of an hour. gus ran 8 2/3 miles in 1.25 hours. who had a faster speed

2 4/5 ÷ 0.4 = 4 mph — This is Linda's record

8 2/3 ÷ 1.25 = 4.26 mph — This is Gus's record

Given that 4.26 mph > 4 mph, Gus had a faster speed than Linda

the answer   is 200

step-by-step explanation:

this is a problem about poisson probabilities.   i don't know if you've

already studied poisson distributions, or if you have a place to look

to read more about the subject.  

here's how you can see a poisson distribution coming.   when there are

a lot of events that may happen at any time (or any place), and when

you're counting how many of them happen at a particular time (or a

particular place), and each event is independent of the others, then

the result is a poisson distribution.   this is roughly true for the

chocolate chips; one chip being in a cookie has only a small effect on

the probability that another chip will be in the cookie.

once you know you have a poisson distribution, you know a lot.   there

is only one parameter to a poisson distribution, so if you know the

mean, you know everything.   the form of the distribution is

  probability of n chips = {[e^(-x)]*(x^n)} / (n! )