By using the following frequency distribution of weight distribution of 120 students at virtual university find.

1. Mean Deviation from Mean
2. Co-efficient of Mean Deviation from Mean

Weights(kg)

Frequency

45-49

1

50-54

4

55-59

17

60-64

28

65-69

25

70-74

18

75-79

13

80-84

6

85-89

5

90-94

2

95-99

1