An average: Half of the sum of all numbers in a set of data .
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Distance travelled divided by the time it took.
Average speed = Distance/Time taken
The Average. Add up all the numbers and divide by how many numbers there are :)
Use the definition of average, write the corresponding equation, and solve it. In this case, the equation is:(3 + x + 16 + 18) / 4 = 11 since there are four numbers.
Add the values you wish to average, and divide by the number of values. For example: If I wanted to find the average of 1,2,3,4,5: (1+2+3+4+5)/(5)=3