Answers

2015-09-08T15:22:29+05:30
See the attachment for calculation.

Mean wage = Σ fx /Σ f = 1480/60 = 24.66
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2015-09-08T15:44:44+05:30
Mid mark=12.5+17.5/2=15
17.5+22.5/2=20
22.5+27.5/2=25
27.5+32.5/2=30
32.5+37.5/2=35
arithmetic mean =
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my answer is not complete so I am writing here
arithmetic mean is actually the average so the correct answer is 1430/60=23.83