The histogram below represents the number of television sets

The histogram below represents the number of television sets per household for a sample of U.S. households. How many households are included in the histogram?

Solution

Here X axis shows the number of TV sets 1, 2, 3, 4, 5 and y-axis shows the correponding frequncies. Following table shows the frequency distribution of the data :

That is 1 TV sets is sold to 20 households, 2 TV sets are sold to 50 households etc.. So total number of households is 20+50+15+10+5=100.

Number of TV sets	Frequency
1	20
2	50
3	15
4	10
5	5