Tuesday, February 14, 2012

Mean, Median and Mode


1, school-sprint-21-2008(94)
Thomas took three 100-point quizzes, and the mean score for three quizzes was 87 points.  If the highest score is taken away, the mean of remaining two scores would be 83.5 points.  If the lowest score is taken away, the mean of the remaining two scores would be 89 points, What is the highest score?

2, school-sprint-9-2008(4796)
A set of five distinct positive integers has a mean of 1000 and a median of 100.  What is the largest possible integer that could be included in the set?

3, chapter-target-4-2007(13)
Six years ago a vacant lot was turned into a park.  At that time 46 trees were planted.  Three years ago 50 trees were planted in the park, and 60 trees were planted in the park today.  Each tree was planted as a seed.  Assuming that all of these planted trees survive and no other tree are added in the next 10 years, what will be the average age of the trees in the park 10 years from today?  Express your answer to the nearest whole number.
4, chapter-sprint -7-2007(1)
The mean of four distinct positive integers is 5,  If the largest integer is 13, what is the smallest integer?
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