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Washington State Math Olympiad Hints and Solutions 2013 Grade 7 Probability and Statistics
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Problem |
1) Gino's Pizzeria makes One Price personal pizzas for which you have a choice of one sauce, one vegetable, and one meat. They have 3 different sauces, 5 different vegetables choices, and 5
different meat choices. All come with delicious cheese. How many different versions of the One Price personal pizzas are there?
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2) A full deck of Rook cards consists of cards numbered 1-14 in four different colors plus one special Rook card for a total of 57 cards. Assume the deck is well shuffled. What is the probability of drawing first the Rook and then a 14 followed by a 13 of the same color? You may leave your answer as a product of reduced fractions or as a decimal out to 6 decimal places.
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3)
At the beginning of each school year, Joey and Mateo's mom
marks off their heights on the kitchen wall. Joey measures the
gaps showing annual growth and plots them by the grade level. He notices he grew more between kindergarten and 1st grade than
Mateo by an inch. Which boy has the higher average annual growth and by how much? Round to the nearest tenth of an
inch.
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