Statistics: Find the missing frequencies from the following table...

DeepakJeswani

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Feb 8, 2016
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Find the missing frequencies from the following table where Median and total of frequencies are 51 and 100 respectively:
Expansion (in Rs.) 0-20 20-40 40-60 60-80 80-100
No. of families 14 ? 27 ? 15
 
Find the missing frequencies from the following table where Median and total of frequencies are 51 and 100 respectively:
Expansion (in Rs.) 0-20 20-40 40-60 60-80 80-100
No. of families 14 ? 27 ? 15

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Find the missing frequencies from the following table where Median and total of frequencies are 51 and 100 respectively:

Code:
Exp.   | Num.
 (Rs.) | fam.
-------*-----
 0- 20 |   14
20- 40 |    X
40- 60 |   27
60- 80 |    Y
80-100 |   15
If the table had been filled in, how would you have found the total of the frequencies? What equation can you then form, relating the listed values, the two variables I've named for the two unknown numbers, and the total?

If the table had been filled in, how would you have found the median value? What equation can you then form?

With two equations in two unknowns, you have a system that you can solve. Apply any of the methods (that you learned back in algebra) that you like. If you get stuck, please reply showing your thoughts and efforts so far. Thank you! ;)
 
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