Amotor racing circuit has length 5 5/6 miles. a straight section of the circuit has length 1 1/4 miles. what fraction of the circuit is the straight section? give your answer in its simplest form.

Margie is practicing for an upcoming tennis tournament. her first serve is good 20 out of 30 times on average. margie wants to know the estimated probability that her first serve will be good at least four of the next six times she serves. how could she design a simulation for this scenario?