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Problem: mean {{1,2,5,6-10,10-20,20-30,30-50,50-70,70-100},{3,4,10,23,20,20,15,3,2}} [ Calculator, Method and examples ]

Solution:
Your problem `->` mean {{1,2,5,6-10,10-20,20-30,30-50,50-70,70-100},{3,4,10,23,20,20,15,3,2}}


Class
`(1)`
Frequency `(f)`
`(2)`
Mid value `(x)`
`(3)`
`f*x`
`(4)=(2)xx(3)`
1313
2428
510550
6 - 10238184
10 - 202015300
20 - 302025500
30 - 501540600
50 - 70360180
70 - 100285170
------------
`n = 100`-----`sum f*x=1995`


Mean `bar x = (sum fx)/n`

`=1995/100`

`=19.95`








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