WASHINGTON STATE MATHEMATICS COUNCIL
1997 MIDDLE SCHOOL MATH OLYMPIAD
SIXTH GRADE PROBABILITY & STATISTICS
SCHOOL ___________________________ TEAM_______
1). Find the mean, mode, median and range of this set of math test scores:
Express mean to the nearest tenth.
75, 92, 88, 75, 100, 96, 88, 90, 88, 78, 86
Mean:___________ Mode: __________
Median:_________ Range: _________
2). Donilo goes to the "Cinema-6" complex to see 2 different
movies. Cinema-6 has 6 theaters and each shows a different movie. There
are shows at 7 and 9 PM in each theater. How many different movie pairs
can he see?
3). A gum machine contains 8 red gum-balls, 7 green gum-balls, and 2
blue gum-balls. What is the probability of purchasing a gum-ball at random
that is not green?
4). The field in the picture has shaded and unshaded regions. A helicopter
hovers over the field and drops a water balloon. What is the probability
that the balloon will land in a shaded area? Express your answer as a fraction
in simplest form.
5). A sub shop offers the options below for bread, meat, toppings and
dressing on your sub. How many different subs can you order from this sub
shop, assuming you select one bread, one meat, two different toppings and
one dressing per sub?