Hands-on math!

Washington State Math Olympiad
Hints and Solutions
2008 Grade 5 Probability & Statistics
Problem

1) A dart hits the dartboard shown at random. Find the probability of the dart landing in the shaded region.

2) Jazmin has a coin and Sue a 6 sided number cube labeled 1 through 6. They have decided to play a game. What is the probability that Jazmin will flip a head and Sue will roll an even number?

3) Four friends, Amber, Becky, Callie, and Darcy went to a party. If Callie was the third to arrive, how many different orders could the other three friends have arrived in?

Problem

4) After three tests Max has a test average of 83. He is nervous for the fourth test and wants to keep an average of at least 80. What is the lowest score he can get on the fourth test if each test is worth 100 points?

5) A class of 21 children goes to the gym to measure its length in paces. The bar graph shows the distribution for the number of paces it took to traverse the gym lengthwise. All numbers are whole numbers. From the graph which bar contains the median number of paces?