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The Age of 40 Students Are Given in the Following Table : - ICSE Class 10 - Mathematics

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Question

The age of 40 students are given in the following table : 

 Age (in yrs)  12  13 14 15 16 17 18
 Frequency 2 4 6 9 8 7 4    

Find the Arithmetic mean.

Solution

   Age in yrs `x_i`      Frequency `(f_i)`    `F_i X_i`
12 2 24
13 4 52
14 6 84
15 9 135
16 8 128
17 7 119
18 4 72
 Total 40 614

`barx=f_ix_i/(Σ f) =614/40=15.35`  

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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)
24A | Q: 7
Solution The Age of 40 Students Are Given in the Following Table : Concept: Measures of Central Tendency - Mean, Median, Mode for Raw and Arrayed Data.
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