Q2) Based on her past experience, a professor knows that the probability distribution for X = number of students who come to her office hours on Thursday is given below. X 1 3 4 P(x) 0.1 0.2 0.15 0.05 1. What is the probability that exactly 2 students come to office hours on Thursday? 2. What is the expected value of X, E(X)? 3. What is the value of the cumulative probability distribution at 3?

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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l need the answer in 30 mints please please please.
Q2) Based on her past experience, a professor knows that the probability
distribution for X = number of students who come to her office hours on
Thursday is given below.
X
1
3
4
P(x)
0.1
0.2
0.15 0.05
1. What is the probability that exactly 2 students come to office hours on
Thursday?
2. What is the expected value of X, E(X)?
3. What is the value of the cumulative probability distribution at 3?
4. What is the probability that at least 1 student comes to office hours on
Thursday?
5. What is the value of standard deviation o ?
Transcribed Image Text:Q2) Based on her past experience, a professor knows that the probability distribution for X = number of students who come to her office hours on Thursday is given below. X 1 3 4 P(x) 0.1 0.2 0.15 0.05 1. What is the probability that exactly 2 students come to office hours on Thursday? 2. What is the expected value of X, E(X)? 3. What is the value of the cumulative probability distribution at 3? 4. What is the probability that at least 1 student comes to office hours on Thursday? 5. What is the value of standard deviation o ?
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