Evaluate each problem, showing clear evidence of your base 10 understanding.

(a) 84 - 36 (b) 48 25

15. Consider the following two containers.

one container has( MATH) one container has (fan) in them

If a container above is selected at random, and then a letter is selected at random from the chosen container, what is the probability that the letter chosen is an A?

16. Given the following bag of marbles, find the probability of picking three blue marbles in a row (with replacement). 5 green, 3 red, 4 blue

18. (a) make a simulation using the randInt command (in TI-84 Plus graphing calculators and in Microsoft Excel) for the following question: What is the probability of a couple with 4 children having all four girls ) Use randInt(0, _______ ) with even digits (0, 2, 4, 6, 8) representing __________ and _________________________ representing boys.

(b) Then run your simulations 20 times, and comment on how the empirical results compare to what you would expect theoretically.

4796	2234	7951	8842	4017
9193	4088	4713	7249	3033
8203	8047	5536	3043	5118
1535	7964	7879	6703	7512

Theoretically, P(all 4 girls) = _____ vs. from the above simulation, P(all 4 girls) = _____ . In the table above, somehow indicate (suggested: * or highlighting) which item(s) satisfy the event: all 4 girls.

Using Egyptian symbols

list the four 2-digit prime numbers composed of prime digits. _____ , _____ , _____ , _____