The correct option is
D 6
You know,
Mean = Sum of the observationsNumber of the observations
To find the number of observations, you analyse the number line.
We can represent miles per gllon as mpg.
The number of vehicles having mileage of 8 mpg is 2 and
the number of vehicles having mileage of 5 mpg is 3.
∴ Sum of observations will be:
=8+8+5+5+5 =
31
Representing by the dot plots, we see:
∴ Mean mileage of the cars is
=5+5+5+8+85
=315
=31×25×2
= 6210
=6.2 mpg.
Estimating 6.2 to the nearest ones, you get 6.
Therefore, the mean mileage of the cars shown in the picture estimated to the ones place is 6 mpg.