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Member since February 24, 2005
crichey
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Science And Math
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find the sum
Thu 24 Feb, 2005 10:37 am -
Find the sum S=1+2+3+...+1000 Hint: Use a formula or note sum S=1000+999+998+...+3+2+1
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probability
Thu 24 Feb, 2005 10:34 am -
Twenty students gather around an empty hat. Each puts a slip of paper with her student ID number on it into the hat. They each randomly select one slip from the hat. What is the probability that...
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