you lose $2. What is the expected value of X?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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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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CHALLENGE
ACTIVITY
12.6.1: Expectation of a random variable.
464826.3214874.qx3zqy?
Jump to level 1
A fair coin is flipped twice.
If both flips come up heads, you win $7.
If at least one flip comes up tails, you lose $2.
Let X be the random variable that corresponds to your winnings in dollars. Ex: X = 2 if you win $2 and X = -2 if
you lose $2. What is the expected value of X?
E[X]=Ex: 1.23
1
CS Scanne with CamScanner
3
D-D-D-D-
Transcribed Image Text:CHALLENGE ACTIVITY 12.6.1: Expectation of a random variable. 464826.3214874.qx3zqy? Jump to level 1 A fair coin is flipped twice. If both flips come up heads, you win $7. If at least one flip comes up tails, you lose $2. Let X be the random variable that corresponds to your winnings in dollars. Ex: X = 2 if you win $2 and X = -2 if you lose $2. What is the expected value of X? E[X]=Ex: 1.23 1 CS Scanne with CamScanner 3 D-D-D-D-
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