Ask your students in pairs to roll two dice together and to keep a tally of the totals.They should notice that some total numbers appear more often than others.
Ask them to work out how many ways the total of two dice can be 1, 2, 3, 4, etc to 12, and make a chart. There should be 36 different totals. For example there are four ways for the total to be FIVE. They are 4:1 1:4 3:2 and 2:3. If they are correct, they should come up with a chart showing the information below.
So there is only one way a 2 can be thrown, two ways a 3 can be thrown, and six ways a 7 can be thrown. What a difference! The PROBABILITY of throwing a two is 1/36. The PROBABILITY of throwing a seven is 6/36. (36 is the TOTAL number of possible OUTCOMES)
It is good to remember this when playing a game of chance using two dice!