In the summer holiday, each student is required to write at least one book report one book report. The following table represents the probability distribution function of the number of book reports (X) a student has written in the summer holiday. x 1 2 3 4 5 P(X=x) 0.8k k 0.35 0.15 0.05 (a) What is the value of k? (b) Find E(X) and ?(X) (c) Suppose the number of book reports students have written have are independent. In a study group with 8 students, what is the probability that exactly 5 students have written at most 3 book reports?
In the summer holiday, each student is required to write at least one book report one book report. The following table represents the probability distribution function of the number of book reports (X) a student has written in the summer holiday. x 1 2 3 4 5 P(X=x) 0.8k k 0.35 0.15 0.05 (a) What is the value of k? (b) Find E(X) and ?(X) (c) Suppose the number of book reports students have written have are independent. In a study group with 8 students, what is the probability that exactly 5 students have written at most 3 book reports?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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In the summer holiday, each student is required to write at least one book report one book report. The following table represents the
x | 1 | 2 | 3 | 4 | 5 |
P(X=x) | 0.8k | k | 0.35 | 0.15 | 0.05 |
(a) What is the value of k?
(b) Find E(X) and ?(X)
(c) Suppose the number of book reports students have written have are independent. In a study group with 8 students, what is the probability that exactly 5 students have written at most 3 book reports?
Answer (a) (b) (c) and show clear calculation steps
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