Find the mean
Marks 0-20 20-40 40-60 60-80 obtained 80-100
No.of 8 10 12 6
Students 3
Answers
Answered by
1
Step-by-step explanation:
marks. no.of students(fi). xi. fixi
0-20. 8. 10. 80
20-40. 10. 30. 300
40-60. 12. 50. 600
60-80. 6. 70. 420
80-100. 3. 90. 270
=39. =1,670
mean=. 1,670÷39
= 42.8
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