It is a mathematical statement.
It means that the average of a set of numbers is negative 10 and the sum of this average and four is, therefore, negative six!
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It is negative 30.
the sum of all numbers is 6*4=24 sum of two = 2*2=4 average of other four=24-4/4=5
The average of a sequence of numbers is equal to Average(x1, ... , xi) = Sum(n, i = 1)[xi]/n Example: Find the average of 5, 6, 8, 12, 15, and 29. Average = Sum[5, 6, 8, 12, 15, 29]/6 Average = (5+6+8+12+15+29)/6 Average = 11
1.Start 2. Input a,b,c 3. Sum = a+b+c 4. Average = sum/3 5. Output - Sum,Average 6. Stop
6 + - 1 = 5 Here is a little table to help with manipulating double signs. = + = - = - = + NB If no sign is given then read it as (+). So for the above sum we could write + 6 + - 5 = +5