6. In a college, 400 students are graduating this semester. According to the school policy, each student is allowed to invite up to 3 people to the graduation ceremony. Based on the experience from the past, the school estimates the probabilities that a student will bring 0, 1, 2, and 3 people are 10%, 40%, 30% and 20% respectively. Assume the estimation is correct and the college prepares 680 chairs for the invited people, what is the probability that every invited person will have a seat in the graduation ceremony?
6. In a college, 400 students are graduating this semester. According to the school policy, each student is allowed to invite up to 3 people to the graduation ceremony. Based on the experience from the past, the school estimates the probabilities that a student will bring 0, 1, 2, and 3 people are 10%, 40%, 30% and 20% respectively. Assume the estimation is correct and the college prepares 680 chairs for the invited people, what is the probability that every invited person will have a seat in the graduation ceremony?
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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