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                                    The marks obtained by 40 students in class X of a certain school in a math paper of maximum marks '100' are presented in the table. Find the mean using direct method.Class Interval0−1010−2020−3030−4040−50Number of students3413155 28.75 | 
                            
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Answer»  The marks obtained by 40 students in class X of a certain school in a math paper of maximum marks '100' are presented in the table. Find the mean using direct method. Class Interval0−1010−2020−3030−4040−50Number of students3413155 
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