Founded a professional street performers, founded enjoy guitar set on the floor in the street, and then began to pop guitar to people coming and going in the street, founded past experience, in accordance with the average play each song can let two people donate some money in the guitar set, random variables XX represents the joy to the number of volunteers, founded in the morning and one day to play the 3 piece, has identified five people donate, excuse me, are built to play in the afternoon after 3 piece, can let the joy of the day is likely to donate cumulative number greater than 10 people?
I understand that this problem belongs to the Poisson probability, average speed of 2, T to 3, then the X ~ POI (6)
Because the requirements on the day of the cumulative probability of donations for more than 10 people, with 1 - (P (x=1) + P (x=2) + P (x=3) + P (x=4) + P (x=5)), but the result is wrong, should be how to think about this topic, please?
CodePudding user response:
Classmate hello:I was also on the course
Your ideas are right, actually just less calculate a
Button to the right after the answer
Wish you are successful, come on!