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Q 11 - Mathematics

Sum

Q 11 

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Solution

we have,

C.I  f class mark
       x
fx
0 - 10 8 5 40
10 - 20 5 15 75
20 - 30 12 25 300
30 - 40  35 35 1225
40 - 50  45 45 1080
50 - 60 55 55 880
  ∑ f = 100   ∑ fx =  3600

Now , Mean = `(∑fx)/(∑f) = 3600/100 = 36`

  Is there an error in this question or solution?
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