Find the mean from the following data:
Marks Number of students
Below 10 12
Below 20 32
Below 30 57
Below 40 80
Below 50 92
Below 60 116
Below 70 164
Below 80 200
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International relations is an area of study dealing with the interrelationships among nation-states in an age in which nation-states are the principal holder of political power. The study concerns itself with the outcomes of war and peace; consequently, it has practical importance. However, the change in practice has generated considerable confusion as to who are involved as the principal actors; since there are different kinds of state and non-states actors.
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