# The Age of 40 Students Are Given in the Following Table : - Mathematics

Sum

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 Concise Maths Class 10 ICSE
Chapter 24 Measure of Central Tendency(Mean, Median, Quartiles and Mode)
Exercise 24 (A) | Q 7 | Page 356