grade =[45,70,30,55,69]
tuple_grade=(40,50,56,45,35) #imutable
set_grade = {50,60,70} #unique and unorder
tuple_grade = tuple_grade+(100,)
grade.append(200)
print(tuple_grade)
print(sum(grade)/len(grade))



#set operations

#union
#intercetion
nested_list = [5,6,3,[4,7,4,11,[33,20,10]]]
print(nested_list[3][4][1])
