Option C is cotrrect answer - $304.50
Explanation:
The mean is calculated by adding all the values and then dividing it by the number of units. In general terms mean is also called as an average.
As per the given question:
Mean cost of repairing a starter of four multifarious vehicles is to be found out
The cost given are : $316, $443, $249, $210, Number of vehicles = 4
In order to calculate mean, first of all, sum has to be found out of four vehicles
Sum = $316+ $443+ $249+ $210 = $1218
Now, this sum is to be divided by the number of units that is 4 = $1218 divided by 4 = $304.50
Hence, mean = $304.50
