Find the Q1 of the the following data : 78, 63, 56, 85, 62, 59, 78, 90, 97, 83, 73, 64, 84, 86, 66, 67, 59, 77
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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?
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?
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Herald’s birth month is April. What is the probability that someone will guess his birthday on first try if the date is two even digits?
At a car park there are 100 vehicles, 60 of which are cars, 30 are vans and the remainder are lorries. If every vehicle is equally likely to leave, find the probability of: a) a van leaving first. b) a ...
