Saturday
October 25, 2014

Homework Help: Intro to Probability, please check my work.

Posted by Amelie on Sunday, February 17, 2008 at 3:35pm.

A fair coin is flipped three times. You win $5 every time the outcome is heads. Let the random variable X represent the total number of dollars you win.
(a) List the sample space.
(b) Determine the probability function of X.
======================
Answer: a) 2^3= 8 possibilities.
b) (P(heads 1st time)+ P(heads 2nd time) +P( heads 3rd time)) / 15

since each probability has 1/2 chance of occuring, the answer is 1/10

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

math - a fair coin is flipped 5 times the random variable is x is defined to be ...
probability - A fair coin is flipped independently until the first Heads is ...
stor - Suppose that you flip a fair coin (P(H)=P(T)=1 2 ) three times and you ...
Intro to Probability, check some of my work please - 1.) An octave contains ...
maths - Suppose there are 10 coins laid out in front of you. All of the coins ...
probability - Suppose an unfair coin comes up heads 52.2% of the time if it is ...
Probability - 1.) An octave contains twelve different musical notes (in Western ...
Probability - Suppose that an unfair coin comes up heads 54.1% of the time. The...
statistics - air coin is flipped 20 times. a. Determine the probability that the...
Finite - Assume that the coin is weighted so that Pr[H] = [ 1/11], and that it ...

Search
Members