I have exams coming up and I have a question say hypothetically you have a 71.69% as a grade and you fail your exam which is 10% of you’re grade what would be you’re over all score. Also could you also tell me what it would be if the exam is 20% if you’re grade?

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?