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The Following Table Given the Weekly of Workers in a Factory: - ICSE Class 10 - Mathematics

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Question

The following table given the weekly of workers in a factory: 

Weekly wages (in Rs)  No.of workers 
50-55 5
55-60 20
60-65 10
65-70 10
70-75 9
75-80 6
80-85 12
85-90 8

Calcculate: (1)the mean, (2) the model class, (3) th number of workers getting weekly qages below Rs. 80 and (4) the number of workers getting Rs. 65 or more but less than Rs.85 as weekly wages.

Solution

Weekly Wages (in Rs ) No.of Workers (f) Cumlative Frequency Class marks (x) fx
50-55 5 5 52.5 262.5
55-60 20 25 57.5 1150.0
60-65 10 35 62.5 625.0
65-70 10 45 67.5 675.0
70-75 9 54 72.5 652.5
75-80 6 60 77.5 465.0
80-85 12 72 82.5 990.0
85-90 8 80 87.5 700.0
Total  80     5520.0

(1)Mean= `(Σ f_x)/(Σ f)=5520/80=69`  

(2)Model class = 55 - 60 as it has maximum frequencies. 

(3)Number of workers getting wages below Rs.80 = 60 

(4)Number of workers getting Rs. 65 or more and less than Rs.85 = 72 - 35 = 37 

  Is there an error in this question or solution?

APPEARS IN

 Selina Solution for Selina ICSE Concise Mathematics for Class 10 (2018-2019) (2017 to Current)
Chapter 24: Measure of Central Tendency(Mean, Median, Quartiles and Mode)
24E | Q: 2
Solution The Following Table Given the Weekly of Workers in a Factory: Concept: Measures of Central Tendency - Mean, Median, Mode for Raw and Arrayed Data.
S
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