A group of 8 swimmers are swimming in a race. Prizes are given to first, second and third. How many possible outcomes can there be?
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Half of the class scored 90 in the test. One third of the class scored 87. One-sixth of the class scored 89. What is the average grade of the entire class?
What is the formula for the mean in a frequency table?
What is the probability of drawing an ace and king in a deck of cards?
Simple Identification
Answer: Geometric mean
Who proved that there are infinitely many primes?