A glass tumbler contain 1 billion amoeba and two sodium ions are there on the body of each amoeba. fihd out the charge in the glass.
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Explanation:
Let A be the set of students in chemistry class and B be the set of students in physics class. It is given that and .
If two classes meet at the same hour, then there will not be a common student sitting in both the classes.
Therefore,
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