# The Following Table Givens the Age of 50 Student of a Class . Find the Arithmetic Mean of Thier Agges. - Mathematics

The following table givens the age of 50 student of a class . find the arithmetic mean of thier agges.

 Age- Years 16-18 18-20 20-22 22-24 24-26 No.of students 2 7 21 17 3

#### Solution

 Age in years C.I X_i Number of student  (f_i) x_i f_i 16-18 17 2 34 18-20 19 7 133 20-22 21 21 441 22-24 23 17 391 24-26 25 3 75 Total 50 1074

barx=f_ix_i/(∑ f)=1074/50=21.48

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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 (B) | Q 1 | Page 362