Let $X$ be a random variable with possible values $1,2,3,4$, and corresponding probabilities $P(X=1)=p$, $P(X=2)=0.4$, $P(X=3)=0.25$, and $P(X=4)=0.3$. Then the mean of $X$ is: a. cannot be determined b. $2.75 + p$ c. 2.8 d. 2.75 can you also explain please.

Let $X$ be a random variable with possible values $1,2,3,4$, and corresponding probabilities $P(X=1)=p$, $P(X=2)=0.4$, $P(X=3)=0.25$, and $P(X=4)=0.3$. Then the mean of $X$ is: a. cannot be determined b. $2.75 + p$ c. 2.8 d. 2.75 can you also explain please.

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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Question

Let $X$ be a random variable with possible values $1,2,3,4$, and corresponding probabilities $P(X=1)=p$, $P(X=2)=0.4$, $P(X=3)=0.25$, and $P(X=4)=0.3$. Then the mean of $X$ is:

a. cannot be determined
b. $2.75 + p$
c. 2.8
d. 2.75

can you also explain please.

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