Question

Complete the following table:

Weights (in kg.)	Tally Marks	Frequency (Number of persons)
40 – 50	${\displaystyle \cancel{\mid \mid \mid \mid }\cancel{\mid \mid \mid \mid }\mid \mid }$
50 – 60	${\displaystyle \cancel{\mid \mid \mid \mid }\cancel{\mid \mid \mid \mid }\mid \mid \mid \mid }$
60 – 70	${\displaystyle \cancel{\mid \mid \mid \mid }\mid }$
70 – 80	${\displaystyle \mid \mid }$
80 – 90	${\displaystyle \mid }$

Find the total number of persons whose weights are given in the above table.

Answer 1

Weights (in kg.)	Tally Marks	Frequency (Number of persons)
40 – 50	${\displaystyle \cancel{\mid \mid \mid \mid }\cancel{\mid \mid \mid \mid }\mid \mid }$	12
50 – 60	${\displaystyle \cancel{\mid \mid \mid \mid }\cancel{\mid \mid \mid \mid }\mid \mid \mid \mid }$	14
60 – 70	${\displaystyle \cancel{\mid \mid \mid \mid }\mid }$	6
70 – 80	${\displaystyle \mid \mid }$	2
80 – 90	${\displaystyle \mid }$	1
Total		35

∴ Total number of persons = 12 + 14 + 6 + 2 + 1 = 35