Question

38 people donated to an organisation working for differently abled persons. The amount in rupees were as follows :

101, 500, 401, 201, 301, 160, 210, 125, 175, 190, 450, 151, 101, 351, 251, 451, 151, 260, 360, 410, 150, 125, 161, 195, 351, 170, 225, 260, 290, 310, 360, 425, 420, 100, 105, 170, 250, 100.

(i) By taking classes 100-149, 150-199, 200-249... prepare grouped frequency distribution table.

(ii) From the table, find the number of people who donated rupees 350 or more.

Answer 1

Given:

38 people donated to an organisation working for differently abled persons. The amount in rupees were as follows:

101, 500, 401, 201, 301, 160, 210, 125, 175, 190, 450, 151, 101, 351, 251, 451, 151, 260, 360, 410, 150, 125, 161, 195, 351, 170, 225, 260, 290, 310, 360, 425, 420, 100, 105, 170, 250, 100.

(i) The grouped frequency distribution table of the given data is as follows:

Class interval	Tally marks	Frequency
100-149	$\cancel{\left|\right|\left|\right||}\left|\right|$	7
150-199	$\cancel{\left|\right|\left|\right||}\cancel{\left|\right|\left|\right||}$	10
200-249	$\left|\right||$	3
250-299	$\cancel{\left|\right|\left|\right||}$	5
300-349	$\left|\right|$	2
350-399	$\left|\right|\left|\right|$	4
400-449	$\left|\right|\left|\right|$	4
450-500	$\left|\right||$	3
	Total	38

(ii) As, 4 + 4 + 3 = 11

So, the number of people who donated rupees 350 or more is 11.