Question 738:

Asked on June 4, 2009

Tags: Expected Value , Random Variable

1

Answer:

No answer provided yet.In a probability distribution for a random variable the values need to add up to 1. So we have a missing value of 3 here and we can find it by adding up all the fractions and subtracting this value from 1.

To do so we need to 1st find the common denominator, which would be 24. This gives us the new fractions 8/24 + 3/24 + 3/24 + 4/24 = (8+3+3+4)/24=18/24.

Simplifying this fraction by taking out a 6 gets us 3/4. So the total of the current values is 3/4 or .75. 1-.75 = .25 so our missing value is 1/4.