Question

Calculate the Arithmetic mean of following data Mark obtained mark.. 30,35,38,40,42,45,48 and frequency mark.. 6,5,6,8,6,2,2

Answer 1

mean of following data Mark obtained mark.. 30,35,38,40,42,45,48

mean=sum of observation/no.of observation
=278/7=39.1

frequency mark.. 6,5,6,8,6,2,2
6 because(3 times)


pls mark as barinliest

Answer 2

Marks  Frequency  FREQUENCY x MARKS
30        6                  180
35        5                  175
38        6                  228
40        8                  320
42        6                  252
45        2                  90
48        2                  96

MEAN = SUM OF Marks x Frequency / total frequency
           = 1341/35=38.3143<APPROX.>

mean