This document provides a 3-step summary of keystrokes for running a probability experiment with two coins using a TI-Nspire calculator: 1) Create a spreadsheet with columns for Coin 1, Coin 2, and Results and generate random numbers between 1 and 2 for each coin toss. 2) Use a formula to tally the results of each coin toss combination in the Results column. 3) Graph the results data to visualize the outcomes of the probability experiment.

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TI-Nspire Mini-Tutorials
A Probability Experiment with Two Coins
Summary of Keystrokes
Create a spreadsheet window and add three list headings:
c14``COIN1eCOIN2e
RESULTS·¤¡ ¡(Make sure the cursor is on cell A1.)
Create a list of random numbers:
=k1I (Press ¤until you get to the int() command, then press
·)
kR (Press ¤ until you get to the rand() command, then press ·)
¢r5+1·
`b33(Press ¤for the number of cells you want to copy the
formula into, around 50, then press·. Press/Rto!generate a new series
of random numbers.)
Repeat this process for column B, starting at cell B1. Make sure that columns A
and B have the same number of rows of data.
Create a list to track the outcomes of the rolls of the dice.
(Move to the formula line for column C, which is the grey cell above cell C1.)
COIN1+COIN2·
Create a graph of the data.
/I5 (Highlight the horizontal axis. Press and hold a until
you see the spreadsheet data lists. Highlight RESULTS, then press ·.)
b2Ab18