International Chemistry Olympiad - IChO - For the competition purposes, all the competitors will be given a calculator Casio fx-991EX. The manual for the calculator can be downloaded from the following link:
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Casio Classwiz fx-991EX Statistics | Find Mean, Variance, Standard Deviation & Summary Statistics - YouTube
CASIO Calculators Philippines - Let's GO QR! The Casio QR Code services of CLASSWIZ FX991ex allows you to scan calculator data & draw graphs (Online Visualization) and provides the calculator Online Manual
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Amazon.com : Casio FX-991ES Plus Scientific Calculator Fx 991 Es - New & Sealed ship to world wide : Office Products
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Casio fx-991EX - Instructions, Owner's guide, Owner's manual, User Guide, User manual, User's Guide | manualzz.com
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