17 th one plsss......
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Answer:
mean = 32.02
Explanation:
pocket money f class mark xi fxi
0 - 10 15 5 75
10 - 20 35 15 525
20 - 30 60 25 1500
30 - 40 85 35 2975
40 - 50 90 45 4050
∑f = 285 ∑ fxi = 9125
mean = ∑ fxi / ∑ f
=> 9125/285 = 32.02
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