For the grouped data

Score Frequency

90-100 8

80-89 12

70-79 26

60-69 14

total=60

An estimate of the mean is____

95*8+84.5*12+74.5*26+64.5*14=4614

4614/60=76.9

76.9 is my answer. Thanks very much for checking my answer. list of possible answers are -

1. 86.75

2. 76.9

3. 75.0

4. 15.0