The following tables gives the number of pages written by sarica for completing her own book for 30 days find the mean number of pages written per day number of pages written day 16-18,19-21,22-24,25-27,28-30number of days 1,3,4,9,13
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Solution :-
Pages No. of Days.(fi) xi fixi
16-18 1 17 17
19-21 3 20 60
22-24 4 23 92
25-27 9 26 234
28-30 13 29 377
Total ⅀fi = 30 ⅀fixi = 780
Therefore,
→ Mean = (⅀fixi) / (⅀fi)
→ Mean = 780 / 30
→ Mean = 26 .(Ans.)
Hence, Required Mean is 26.
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