Thursday, September 2, 2010

probability problems and solutions

Look here for some simple probability problems and solutions. I have worked with you earlier also on what do you mean by probability and also received many positive response on this.

The important types of probability problems are problems on conditional probability, problems on multiplication theorem and problems on bayes theorem. Here I will discuss on conditional probability example below.

Problem 1(On Conditional probability):
A pair of dice is thrown. Find the probability that either of the dices shows 2 when their sum is 6?

Solution:

A: 2 appear on either of the dice and B: the sum of the two numbers on the dice is 6. So, A={(2,1),(2,2),(2,3) ,(2,4) ,(2,5) ,(2,6),(1,2), (2,2) (3,2) (4,2), (5,2) (6,2)},B={(1,5),(2,4),(3,3),(4,2),(5,1)} P(A B)=2/36 hence P(A/B)={P(AB)/P(B)} =2/5.

When your teacher gives you homework on probability, then don't have to worry just take help homework and finish your homework.

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