1. Box models Coin toss = Head = Tail 1 1
= Head
= Tail 1 1
Draw 1 card from the box and record the outcome
Put the card back
10 draws from the box with replacement is equivalent to
10 coin tosses
The sum of the 10 numbers = the number of tails in 10 draws

2. Roll 6 sided die 1 = 1 2 3 4 5 6 = 2 3 =
etc.,….
Draw 1 card and record the outcome
Put the card back in the box
10 draws with replacement is equivalent to 10 rolls of the die
The sum of the 10 draws is the total number of points

3. What if you wanted to model 10 die rolls and count only the number of 5’s?1
= a roll of any number except 5 1
= a roll of a 5
1 chance in 6 of rolling a 5
The sum of the draws is the count of the number of 5’s in that many
draws.
Another way to model the same situation:
This box represents 4 cards with 0 on
them and 1 card with a 1 on it. 5 1 1

4. Don’t do any of the roulette problems.