Probabilities

To find the probabilities of the random walk, and the cross-sectional area of the trapezoids, you need to draw a diagram.

If you have the following diagram, you can figure out the probabilities of landing on one of these spots.

Say you are given a problem where you want to figure out the following things:

X= 1 Y= 1

X= 3 Y= -3

X=1, Y=3 X= -1,Y= -3

Look at the picture and find out how many of the points contain the information the question asks for, as follows:

Information Ways to get it

X= 1 2

Y= 1 2

X= 3 2

Y= -3 2

X=1, Y=3 1

X=-1, Y=-3 1

Probabilites

2/16

2/16

2/16

2/16

1/16

1/16