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Fifteen new students are to be evenly distributed among three classes. Suppose that there are three whiz-kids among the fifteen. (a) What is the probability that each class gets one? (b) one class gets
asked
Jun 24, 2017
Mathematics
college
1
answer
2
votes
225k
views
Why does sodium form a 1+ ion but magnesium forms a 2+ ion
asked
Aug 19, 2016
Chemistry
high-school
1
answer
0
votes
195k
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