Question

The weekly wages (in Rs.) of 30 workers in a factory are given:

830, 835, 890, 810, 835, 836, 869, 845, 898, 890, 820, 860, 832, 833, 855, 845, 804, 808, 812, 840, 885, 835, 835, 836, 878, 840, 868, 890, 806, 840 

Mark a frequency table with intervals as 800-810, 810-820 and so on, using tally marks.

Also, draw a histogram and answer the following questions:

(i) Which group has the maximum number of workers?

(ii) How many workers earn Rs. 850 and more?

(iii) How many workers earn less then Rs, 850?

Answer 1

Class interval	Frequency
800 - 810	4
810 - 820	2
820 - 830	1
830 - 840	11
840 - 850	2
850 - 860	2
860 - 870	2
870 - 880	1
880 - 890	4
890 - 900	1

(i) Group have maximum workers = ( 830 – 840 )

(ii) Workers have earning more than Rs.850 = 2+1+4+1+2 = 10

(iii) Worker earns less than Rs.850 = 4+2+1+11+2 = 20.

Histogram: by drawing class interval on ‘x’ axis and number of workers on ‘y’ axis.