On any given day in which it had rained, there was a 40% chance that the morning was cloudy. When you wake up in the morning, you notice that it is cloudy (event C).

If you want to know the probability that it will rain (event R), which formula would you use?

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?