HIGHLINE SCHOOL DISTRICT
MATH OLYMPIAD
FIRST YEAR COMPETITION
March 22,1997



Probability
and Statistics

School: _________________

Grade: __________________

Team Number: ___________


1). (4 points) Find the mean, mode, median and range of this set of math test scores. Specify mean to the nearest tenth:

85, 81, 95, 90, 75, 78, 81, 100, 85, 75, 81


Mean:__________ Mode: _______

Median:________ Range: _______

2). (4 points) What is the probability of drawing a diamond or a club out of a standard deck of 52 cards?



Answer:_________

3). (4 points) In my bag of marbles I have 6 red marbles, 4 blue marbles, and 7 green marbles. What is the probability of randomly drawing from this bag a marble that is not red?



Answer: ________________

4). (4 points) What is the probability of rolling doubles with a standard pair of dice?



Answer: ________________

5). (4 points) My spelling grade is the average of my scores on 4 tests. My scores on the first 3 tests were 82, 88, and 90. I want to make an "A" which takes a 90 average. What score must my last test be to get my "A"?

Answer: ________________