find the mean of the following frequency distribution answer fast plz
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x = Marks obtained
f = No.of students
Therefore, fx = 5x7, 15x10, 20x6, 35x8, 40x12, 45x3, 50x5, 60x4
fx= 35, 150, 120, 280, 480, 135, 250, 240
Total fx = (35+150+120+280+480+135+250+240) = 1690
Total f = (7+10+6+8+12+3+5+4) = 55
Mean = Total fx / Total f = 1690/55
Mean = 30.72
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