Hands-on math!

Washington State Math Olympiad
Hints and Solutions
2007 Grade 5 Probability & Statistics
Problem
1) What is the probability of rolling an odd product with two 12 sided dice each numbered 1 through 12?

2) The pie chart shows the results of a parking lot survey at a mall on car color. If this survey was based on a sample size of 500 cars, about how many of them were either a red or a black car?

3) The gym teacher wants all 16 children in Mr. Rom's 1st grade class to get to know each other. His plan is to have them work with a different partner each day. How many different partner pairs are possible?

Problem
4) Fill in the blanks in the list of numbers such that the only mode for the list will be 9 and the median will be 15.
4, 9, _____, _____, 13, ____, 17, 23, 23, 28

5) Joe's dad tells Joe he can have the bag of fruit chews he's holding if he can solve this riddle:
There are three flavors: strawberry, orange and lemon. There are 4 strawberry chews. The probability of getting orange is 3/7. The probability of getting lemon is 2/7. How many fruit chews are in the bag?