8th Grade Answer Key

STATISTICS AND PROBABILITY
1. The Piggy Bank	Probability of having more than 30¢ is 7/45.
2. A Spinner	Win $105
3. Ten Numbers	Many answers)… One answer is:2,3,3,3,6,6,7,8,9,53
4. Ice Cream Party	8 scoops will give 256 different ordering possibilities.
5. Swimmers	240 boys in the 8^th grade.
6. Test Averages	Needs to average at least 97%.
7. Table Setting	1/16 probability of being same color.
8. Dice Game	1 (one) will occur most often, 5 (five) will occur least.
9. Archery Accuracy	13 is the most likely minimum number of shots.
10. Dart Chart	P=p/4 »79%
11. Shooting Gallery	He hit the target 4 times.
12. Eight-sided Dice	9 is the most likely sum.
13. Random Drawing	Probability = 89/250 = 35.6%.
14. Arcade Game	Must hit the next 25 times.
15. Factors of 48	Probability = 2/5 = 40%.
16. Coin Flips	Probability that at least one head appears is 6/7
17. Multiple Choice	Probability of scoring 90% is 9/65536
18. Difference Dice	Not fair, 24 ways to get 0,1,2